[User]
What differ strongly in appearance and are barrel shaped?
Options:
- (A) bears
- (B) barnacles
- (C) abdomens
- (D) oxen
- (E) Leptospirosis
- (F) cacti
- (G) burrs
- (H) tunicates
--
Let's think first: Adult tunicates are barrel-shaped. Tunicates differ strongly in appearance between the adult and larva. Tunicates differ strongly in appearance and are barrel shaped.... So the answer is [(H)]
What is important for the chemical equilibrium of the body?
Options:
- (A) sleep
- (B) exercise
- (C) hydration
- (D) dish soap
- (E) eyesight
- (F) hormones
- (G) detergent
- (H) glucose
--
Let's think first: Hormones control many cell activities, so they are very important for homeostasis. Homeostasis is the chemical equilibrium of the body. Hormones are very important for the chemical equilibrium of the body.... So the answer is [(F)]
Most what in a gene pool are beneficial to organisms?
Options:
- (A) resistance activities
- (B) genetic ties
- (C) genetic distractions
- (D) Plant reproduction
- (E) fur and fat
- (F) resistance
- (G) genetic variations
- (H) genetic similarities
--
Let's think first: Mutation creates new genetic variation in a gene pool. Most mutations are beneficial to the organism. Most genetic variations in a gene pool are beneficial to organisms.... So the answer is [(G)]
What has good eyesight?
Options:
- (A) humans
- (B) fur seals
- (C) athletes
- (D) bears
- (E) goats
- (F) geckos
- (G) elephants
- (H) rabbit
--
Let's think first: Most reptiles have good eyesight and a keen sense of smell. Geckos are, in fact, reptiles. Geckos have good eyesight.... So the answer is [(F)]
What occurs when a male gamete swims to an egg?
Options:
- (A) permineralization
- (B) competition
- (C) movement
- (D) rapid expansion
- (E) fertilization
- (F) birth
- (G) copulation
- (H) ovulation
--
Let's think first: Fertilization occurs when sperm swim to an egg inside an archegonium. Gametes in males are called sperm, and in women commonly referred to as eggs. Fertilization occurs when male gametes swim to an egg.... So the answer is [(E)]
Flowing water can slowly _ carbon in limestone.
Options:
- (A) alter
- (B) destroy
- (C) erode
- (D) allow growth
- (E) dissolve
- (F) heat
- (G) a solute
- (H) rain
--

[Assistant] Let's think first: Flowing water can slowly dissolve carbon in sedimentary rock. Limestone is an organic, sedimentary rock. Flowing water can slowly dissolve carbon in limestone.... So the answer is [(E)]


[User]
If an animal has a spinal column in their skeletal system what is it called?
Options:
- (A) skeletal animal
- (B) vertebrate
- (C) A Greek letter
- (D) invertebrated
- (E) organ
- (F) critical organs
- (G) spined animal
- (H) epidermal
--
Let's think first: Vertebrates are animals that have a backbone. Vertebrates generally have a backbone called the spinal column. Vertebrates are animals that have a spinal column in their skeletal system.... So the answer is [(B)]
Some touch receptors sense a difference in pain or what?
Options:
- (A) heat
- (B) cold
- (C) skin
- (D) nerves
- (E) color
- (F) contact
- (G) smell
- (H) motion
--
Let's think first: Some touch receptors sense differences in temperature or pain. Heat and temperature are the same. Some touch receptors sense differences in heat or pain.... So the answer is [(A)]
Which of the following do not grow using mitosis?
Options:
- (A) skin cells
- (B) genus
- (C) fungi
- (D) lung cells
- (E) blood cells
- (F) parasites
- (G) viruses
- (H) bacteria
--
Let's think first: Populations of viruses do not grow through cell division because they are not cells. Mitosis is cell division. Populations of viruses do not grow through mitosis because they are not cells.... So the answer is [(G)]
Most of the food consumed by people worldwide comes from
Options:
- (A) humans
- (B) trees
- (C) Energy
- (D) animals
- (E) plants
- (F) vitamin C
- (G) honeybees
- (H) Earth
--
Let's think first: Grasses supply most of the food consumed by people worldwide. Grasses are very distinctive plants. Plants supply most of the food consumed by people worldwide.... So the answer is [(E)]
How do salamanders usually find sexual partners?
Options:
- (A) mouth of rivers
- (B) It helps them survive
- (C) interact
- (D) it needs them
- (E) competition
- (F) movement
- (G) sense of smell
- (H) heat produced
--
Let's think first: Most salamanders use their sense of smell to find a mate. To couple in sexual union, to be matched or mated. Most salamanders find sexual partners by their sense of smell.... So the answer is [(G)]
What does fire require to get started?
Options:
- (A) an engine
- (B) activation energy
- (C) water
- (D) energy usage
- (E) direct energy
- (F) dogs
- (G) activated almonds
- (H) adding heat
--

[Assistant] Let's think first: All chemical reactions require activation energy to get started. Fire is a chemical reaction. Fire requires activation energy to get started.... So the answer is [(B)]


[User]
What animal must adapt to salt water?
Options:
- (A) fur seals
- (B) warm-blooded
- (C) allow growth
- (D) alpacas
- (E) honeybees
- (F) Sea tiger.
- (G) animals
- (H) to stay warm
--
Let's think first: Organisms that live in marine biomes must be adapted to the salt in the water. Another animal that lives within the Marine Biome is a sea tiger. Sea tigers must adapt to the salt in the water.... So the answer is [(F)]
What does an earthworm do that would help plants?
Options:
- (A) reusing materials
- (B) It helps them survive
- (C) eat the plant
- (D) scare away birds
- (E) reproduce
- (F) hydrate their cells
- (G) burrow in the dirt
- (H) eat all the dirt
--
Let's think first: Earthworm burrows help aerate soil, which is also good for plants. Dirt is really misplaced soil. Earthworm burrows help aerate dirt, which is also good for plants.... So the answer is [(G)]
Cacti are adapted to what?
Options:
- (A) the snow
- (B) dry environments
- (C) Animal survival
- (D) survival
- (E) tropical regions
- (F) moist environments
- (G) relocation
- (H) salt and water.
--
Let's think first: Plants that are adapted to very dry environments are called xerophytes. Succulents, bromeliads and cacti are xerophytes. A plant that is adapt to a very dry environment is a cacti.... So the answer is [(B)]
How can viruses make copies of themselves?
Options:
- (A) A compound that donates proton
- (B) attach themselves to cells
- (C) have sex with another virus
- (D) distances themselves from cell
- (E) attach themselves to viruses
- (F) it needs them
- (G) rapid expansion
- (H) By wind and rain
--
Let's think first: Viruses cannot reproduce by themselves. Viruses attach themselves to cells and reproduce. Viruses cannot make copies of themselves alone. They need to attach themselves to cells.... So the answer is [(B)]
What has a special excretory structure?
Options:
- (A) Silk plants.
- (B) Insects.
- (C) a fish
- (D) animals
- (E) plants
- (F) Architecture structures.
- (G) barnacles
- (H) Corset structure.
--
Let's think first: Some arthropods have special excretory structures. All insects are arthropods. Insects have special excretory structures.... So the answer is [(B)]
Fertilization of what would produce a diploid zygote?
Options:
- (A) fetus
- (B) seeds
- (C) H 2 O
- (D) bamboo
- (E) offspring
- (F) eggs
- (G) apples
- (H) sperm
--

[Assistant] Let's think first: Fertilization of gametes produces a diploid zygote. Female gametes are called eggs. Fertilization of eggs produces a diploid zygote.... So the answer is [(F)]


[User]
What is the process of breaking down food into nutrients?
Options:
- (A) recycling
- (B) food processing
- (C) digestion
- (D) bacteria
- (E) eating
- (F) hydration
- (G) Dehydration
- (H) blender
--
Let's think first: Digestion is the process of breaking down food into components the body can absorb. Nutrients are absorbed by the intestines and if the walls are coated, fewer nutrients are absorbed. Digestion is the process of breaking down food into nutrients.... So the answer is [(C)]
Which of the following would animals use to store energy?
Options:
- (A) fats
- (B) plants
- (C) sodium
- (D) blood
- (E) Energy
- (F) sugar
- (G) food
- (H) carcass
--
Let's think first: Animals use saturated fatty acids to store energy. Fatty Acids Fatty acids are the building blocks of fats. Animals use fats to store energy.... So the answer is [(A)]
How do echinoderms use their feet to locomote themselves?
Options:
- (A) one at a time
- (B) to move people
- (C) running and lifting
- (D) protein channels
- (E) a hydraulic system
- (F) it needs them
- (G) undulations
- (H) It helps them survive
--
Let's think first: Echinoderms have a unique water vascular system with tube feet. Echinoderms have a hydraulic system of locomotion called the water vascular system. Echinoderms have a hydraulic system of locomotion with tube feet.... So the answer is [(E)]
What is part of the kidney structure?
Options:
- (A) thorax
- (B) glomerulus
- (C) organ
- (D) arteries
- (E) layers of fat
- (F) more abundant
- (G) pancreas
- (H) urine
--
Let's think first: Nephrons are the structural and functional units of the kidneys. Each nephron has a glomerulus. Glomerulus is part of the kidney structure.... So the answer is [(B)]
What can slowly dissolve carbon in sedimentary rock?
Options:
- (A) hydrocarbons
- (B) acetic acid
- (C) precipitation
- (D) evaporation
- (E) rivers and streams
- (F) puddles
- (G) ponds
- (H) nitrogen
--
Let's think first: Flowing water can slowly dissolve carbon in sedimentary rock. Rivers and streams are bodies of fresh, flowing water. Rivers and streams can slowly dissolve carbon in sedimentary rock.... So the answer is [(E)]
Oncogenes promote the division of cells with damaged what?
Options:
- (A) Veins and arteries.
- (B) biological diversity
- (C) Something with a head, thorax, and abdomen
- (D) a hemisphere is tilted away from the sun
- (E) Addition
- (F) Person's genetic fingerprint
- (G) Mathematics division
- (H) Cell phones
--

[Assistant] Let's think first: Oncogenes promote the division of cells with damaged DNA. DNA DNA DNA is a person's genetic fingerprint. Oncogenes promote the division of cells with damaged parts of a person's genetic fingerprint.... So the answer is [(F)]


[User]
[Q] What happens when sperm swim from men's to women's reproductive organs?
Options:
- (A) by indirect light
- (B) matter vibrating
- (C) death
- (D) competition
- (E) fertile crescent
- (F) fertilizer
- (G) permineralization
- (H) fertilization
[A] Here's my solution: Sperm had to swim from male to female reproductive organs for fertilization. And the word for woman means a female of any age. Sperm have to swim from men to women reproductive organs to be fertilized. The answer is (H).

[Q] Viruses first infect, then they release into the host by doing what?
Options:
- (A) Cooking
- (B) kill them
- (C) harm them
- (D) lysing
- (E) illness
- (F) fever
- (G) migrate
- (H) propagate
[A] Here's my solution: Viruses infect and live inside the cells of living organisms. If the virus is nonenveloped it is released by lysing the host cell. Infection by viruses leads to lysing and release. The answer is (D).

[Q] Harm to the respiratory and circulatory systems can come from
Options:
- (A) Greenhouse gases
- (B) hydrocarbons
- (C) Sulfur dioxide
- (D) nitrogen oxides
- (E) burning coal
- (F) fossil fuels
- (G) emissions
- (H) Greenhouse gasses
[A] Here's my solution: Air pollution harms the respiratory and circulatory systems. Nitrogen oxides cause air pollution. Nitrogen oxides harms the respiratory and circulatory systems. The answer is (D).

[Q] What do migrants usually do?
Options:
- (A) move to different locations
- (B) animal transport
- (C) they will move to another area
- (D) spread flower seeds
- (E) dwell in a city
- (F) travel to a far away place
- (G) become their country president
- (H) dwell on a farm
[A]

[Assistant] Here's my solution: Migrants typically travel long distances. Distance Finder Find the distance between two places. Migrants usually travel between two places fa away from each other. The answer is (F).


[User]
question... How do squids reproduce?
Options:
- (A) while flying
- (B) seeds
- (C) split in two
- (D) electrically
- (E) sexually
- (F) asexually
- (G) movement
- (H) fertile
answer... Mollusks reproduce sexually. Interestingly, a squid is also a mollusk. Squids reproduce sexually.
The answer is (E)

question... Where does dna reside?
Options:
- (A) membrane
- (B) cells
- (C) embryos
- (D) atom
- (E) complex
- (F) nucleotide
- (G) ligt
- (H) retina
answer... DNA is found in chromosomes. Genes live on chromosomes, chromosomes live in cells. DNA is found in cells.
The answer is (B)

question... What is not made up of cells?
Options:
- (A) an object
- (B) Veins and arteries.
- (C) Tobacco mosaic
- (D) an organism's body
- (E) Conifers
- (F) sensory neurons
- (G) layers of fat
- (H) the digestive system
answer...

[Assistant]
Viruses are not cells. Viruses include the Tobacco Mosaic Virus. Tobacco mosaic is not made up of cells.
The answer is (C)


[User]
When gametes fuse, the resultant zygote is:
Options:
- (A) fertile
- (B) diploid
- (C) Flowers
- (D) grow
- (E) infected
- (F) It expands
- (G) pollen
- (H) seeds
--
Let's think first: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Familiar types of gamete include the female ovum , or egg cell, and the male sperm cell. Fertilization occurs when the male and female gametes fuse to form a diploid zygote.... So the answer is [(B)]

What will die without a supply of blood?
Options:
- (A) plants
- (B) organs
- (C) brain cells
- (D) athletes
- (E) humans
- (F) species
- (G) critical organs
- (H) mushrooms
--
Let's think first: Brain cells die quickly if their oxygen supply is cut off. Here, the lungs supply the blood with oxygen. Brain cells die quickly if their blood supply is cut off.... So the answer is [(C)]

Marine animals find these to be a great source of food:
Options:
- (A) grain
- (B) nutrient
- (C) sponges
- (D) Energy.
- (E) sea vents
- (F) sodium
- (G) Energy
- (H) fungi
--

[Assistant] Let's think first: Sponges are a source of food for many species of fish. Fish and other marine animals abound here. Sponges are a source of food for many marine animals.... So the answer is [(C)]


[User]
Q: What live mainly in shallow coastal waters?
Options:
- (A) Sea species
- (B) Coast guards
- (C) animals
- (D) Live Whales
- (E) Shallow people
- (F) fur seals
- (G) a fish
- (H) parasites
A: So, my chain of thought: Marine species live mainly in shallow coastal waters. Marine Science Marine science is the study of the sea. Sea species live mainly in shallow coastal waters. The answer is (A).

Q: Fertilization occurs when an egg and what join together to form a diploid zygote?
Options:
- (A) rapid expansion
- (B) testosterone
- (C) gastropod shells
- (D) penis
- (E) peachleaf willow
- (F) pollen
- (G) male hormone
- (H) male gamete
A: So, my chain of thought: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Male gametes are called sperm. Fertilization occurs when a male gamete and an egg fuse to form a diploid zygote. The answer is (H).

Q: The measurement of what falls from lower to higher altitudes?
Options:
- (A) snow
- (B) rain
- (C) Energy
- (D) heat
- (E) Inches
- (F) meters
- (G) H 2 O
- (H) motion
A:

[Assistant] So, my chain of thought: Temperature falls from lower to higher altitudes. Heat and temperature are the same. Heat falls from lower to higher altitudes. The answer is (D).


[User]
[Q] What provides protection for soft tissues and internal organs?
Options:
- (A) fur and fat
- (B) eye color
- (C) peachleaf willow
- (D) synapses
- (E) a cuticle
- (F) layers of fat
- (G) nerves
- (H) the skeleton
[A] Here's my solution: Bone provides protection for soft tissues and internal organs. Bone is the substance that forms the skeleton of the body. The skeleton provides protection for soft tissues and internal organs. The answer is (H).

[Q] How do male dogs mark their territory?
Options:
- (A) Chemical energy
- (B) Hot dog eating contest
- (C) Adequate signage
- (D) with their fur
- (E) Scent marker
- (F) heat produced
- (G) mate with females
- (H) Paint
[A] Here's my solution: Male dogs use pheromones in urine to mark their territory. During Urination Dog's urine is used as a scent marker for other dogs. Male dogs mark their territory with a scent marker. The answer is (E).

[Q] Where do dogs store energy?
Options:
- (A) Something coming from a gland
- (B) saturated fatty acids
- (C) Earth orbiting the Sun
- (D) the environment
- (E) Slowing the transfer of heat
- (F) an organism's body
- (G) it keeps an organism warm
- (H) it helps plants in growing
[A] Here's my solution: Animals use saturated fatty acids to store energy. All dogs are animals . Dogs use saturated fatty acids to store energy. The answer is (B).

[Q] What shows evolution over geologic time above the level of the species?
Options:
- (A) speciation events
- (B) Leptospirosis
- (C) cliffs
- (D) rapid expansion
- (E) peachleaf willow
- (F) swamp vegetation
- (G) Darwin
- (H) RNA
[A]

[Assistant] Here's my solution: Macroevolution is evolution over geologic time above the level of the species. Speciation events are thus examples of macroevolution. Speciation events show evolution over geologic time above the level of the species. The answer is (A).


[User]
What do cells make up of organisms?
Options:
- (A) structure only
- (B) function only
- (C) structure and function
- (D) members of their own species
- (E) Something that is self-aware
- (F) share properties
- (G) desires and needs
- (H) Most plants
--
Let's think first: Cells are the basic units of the structure and function of living things. An organism is a living thing or something that was once alive. Cells are the basic units of the structure and function of organisms.... So the answer is [(C)]

Damage to the structural units of the kidneys can be caused by ..
Options:
- (A) harmful substances
- (B) an area swollen with pus
- (C) a lot of human deaths
- (D) Pesticides
- (E) Heavy rains
- (F) Leptospirosis
- (G) Veins and arteries.
- (H) high blood pressure
--
Let's think first: Nephrons are the structural and functional units of the kidneys. Damage to the nephrons can be caused by conditions such as diabetes and high blood pressure . Damage to the structural units of the kidneys can be caused by high blood pressure ..... So the answer is [(H)]

Why do male gametes swim from male to female reproductive organs?
Options:
- (A) temperature changes
- (B) to leave the egg
- (C) fertilization
- (D) competition
- (E) it needs them
- (F) to feed
- (G) permineralization
- (H) to heal themselves
--

[Assistant] Let's think first: Sperm had to swim from male to female reproductive organs for fertilization. Male gametes are called sperm. Male gametes had to swim from male to female reproductive organs for fertilization.... So the answer is [(C)]


[User]
Plants and snakes live _.
Options:
- (A) almost everywhere
- (B) important habitats
- (C) hydrate their cells
- (D) reproduce
- (E) more abundant
- (F) competing for resources
- (G) the environment
- (H) vegetation
--
Let's think first: Plants live just about everywhere on Earth. Snakes live almost everywhere on earth. Plants live just about everywhere snakes do.... So the answer is [(A)]
Changing in animals occurs by a process called what?
Options:
- (A) world climate change
- (B) It helps them survive
- (C) natural selection
- (D) Leptospirosis
- (E) ozone
- (F) relocation
- (G) permineralization
- (H) animal growth
--
Let's think first: Evolution occurs by a process called natural selection. Actually, evolution is adaptation to change. Changing occurs by a process called natural selection.... So the answer is [(C)]
Mutation leads to _.
Options:
- (A) Devolution
- (B) Plants growth
- (C) rapid expansion
- (D) Evolution.
- (E) Degeneration
- (F) Extinction
- (G) massive damage
- (H) anemia
--
Let's think first: Mutation creates new genetic variation in a gene pool. Genetic variation is the raw material for evolution. Mutation leads to evolution.... So the answer is [(D)]
The bonds of that which when heavy is deuterium cause what to expand when it freezes?
Options:
- (A) matter
- (B) rings
- (C) CO 2
- (D) liquids
- (E) gas
- (F) solutes
- (G) cations
- (H) water
--
Let's think first: Hydrogen bonds cause water to expand when it freezes. Deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added. The bonds of that which when heavy is Deuterium cause water to expand when it freezes.... So the answer is [(H)]
Wetlands are extremely important
Options:
- (A) water conservation
- (B) global ecosystems
- (C) Desert Ecosystem
- (D) Terrestrial ecosystems
- (E) important habitats
- (F) the environment
- (G) food and shelter
- (H) Forest Ecosystems
--
Let's think first: Wetlands are extremely important biomes. Biomes are global ecosystems. Wetlands are extremely important global ecosystems.... So the answer is [(B)]
How do salamanders usually find sexual partners?
Options:
- (A) mouth of rivers
- (B) It helps them survive
- (C) interact
- (D) it needs them
- (E) competition
- (F) movement
- (G) sense of smell
- (H) heat produced
--

[Assistant] Let's think first: Most salamanders use their sense of smell to find a mate. To couple in sexual union, to be matched or mated. Most salamanders find sexual partners by their sense of smell.... So the answer is [(G)]


[User]
What is one reason birds have covered bodies?
Options:
- (A) To help them burrow
- (B) They have thick fur
- (C) layers of fat
- (D) To help them fly
- (E) To keep their body heat.
- (F) To attract predators
- (G) with their fur
- (H) To make them heavier
--
Let's think first: Feathers help birds fly and provide insulation. Birds have bodies covered with feathers. Birds bodies are covered to help them fly and provide insulation.... So the answer is [(D)]
What can happen when menstruation stops occurring?
Options:
- (A) Localized damage
- (B) Dehydration
- (C) periods
- (D) diabetes
- (E) massive damage
- (F) hot flashes
- (G) Sulfur dioxide
- (H) epilepsy
--
Let's think first: Menopause occurs when menstruation stops occurring, usually in middle adulthood. Hot flashes are the classic sign of menopause and peri-menopause. Hot flashes can occur when menstruation stops occurring.... So the answer is [(F)]
What is a major food source for other organisms, including humans?
Options:
- (A) gastropod shells
- (B) orchids
- (C) invertebrates
- (D) swamp vegetation
- (E) Most plants
- (F) insects
- (G) barnacles
- (H) animals
--
Let's think first: Mollusks are a major food source for other organisms, including humans. Mollusks are invertebrates and are no exception. Invertebrates are a major food source for other organisms, including humans.... So the answer is [(C)]
How does a squid produce?
Options:
- (A) Energy.
- (B) photons
- (C) voltage
- (D) sexually
- (E) Energy
- (F) bioaerosols
- (G) waves
- (H) food
--
Let's think first: Mollusks reproduce sexually. Interestingly, a squid is also a mollusk. Squids produce sexually.... So the answer is [(D)]
Scientists study animal behavior through which of the following?
Options:
- (A) audio and video tape
- (B) Electrical energy
- (C) irradiation
- (D) A computer
- (E) raising their temperature
- (F) Something coming from a gland
- (G) The bending of a ray of light
- (H) characteristics
--
Let's think first: Ethologists usually study how animals behave in their natural environment. Many ethologists capture their observations on videotape or audio tape. Scientists who study how animals behave use videotape or audio tape.... So the answer is [(A)]
When does macroevolution over eras occur?
Options:
- (A) relocation
- (B) colder and wetter
- (C) in a few years
- (D) permineralization
- (E) over eras of time
- (F) within a lifetime
- (G) Continents drifting
- (H) in minutes
--

[Assistant] Let's think first: Macroevolution is evolution over geologic time above the level of the species. Geologists break time down into geologic time units called eras . Macroevolution is evolution over eras above the level of the species.... So the answer is [(E)]


[User]
What grow in width and length.?
Options:
- (A) crocodiles
- (B) sedimentary rocks
- (C) vegetation
- (D) remains of prehistoric life
- (E) swamp vegetation
- (F) shrub beds
- (G) underground systems
- (H) loose dirt
--
Let's think first: Roots grow in length and width from primary and secondary meristem. Kids see the underground root systems of trees and then an aerial view of plants in the city. Underground systems grow in width and length.... So the answer is [(G)]
What powers sweat?
Options:
- (A) heat produced
- (B) The body's fuel
- (C) a gas in the air
- (D) hydration
- (E) When the water is hot
- (F) air cools
- (G) matter vibrating
- (H) Cooling vapors
--
Let's think first: Evaporation of sweat uses energy, and the energy comes from body heat. Energy is the body's fuel. When sweat is evaporated, the body's fuel is used.... So the answer is [(B)]
What happens to genes located on the same chromosome
Options:
- (A) metabolic reaction
- (B) production of energy
- (C) produce offspring
- (D) female sex cells
- (E) The flowers are pollinated
- (F) They are inherited together
- (G) Earth orbiting the Sun
- (H) a hemisphere is tilted away from the sun
--
Let's think first: Genes that are located on the same chromosome are called linked genes. Linked genes are inherited together. Genes that are located on the same chromosome are inherited together.... So the answer is [(F)]
What has woody stems covered with bark?
Options:
- (A) sunflowers
- (B) Newton
- (C) ferns
- (D) seaweed
- (E) Most plants
- (F) palm trees
- (G) evergreens
- (H) orchids
--
Let's think first: Trees have woody stems covered with bark. Orange trees are evergreen trees. Evergreens have woody stems covered with bark.... So the answer is [(G)]
What describes something that requires activation energy to get started?
Options:
- (A) igniting fuel and oxidiser
- (B) heating liquids
- (C) Fully cooking the oysters
- (D) Riding a bike
- (E) an engine
- (F) burning coal
- (G) chemical equations
- (H) Firecrackers
--
Let's think first: All chemical reactions require activation energy to get started. Chemical equations describe chemical reactions. Chemical equations describe something that requires activation energy to get started.... So the answer is [(G)]
What feeds on plankton and nonliving organic matter?
Options:
- (A) bacteria
- (B) barnacles
- (C) animals
- (D) sharks
- (E) pythons
- (F) graptolites
- (G) molluscs
- (H) bears
--

[Assistant] Let's think first: Bivalves feed on plankton and nonliving organic matter. Bivalve molluscs are very common. Molluscs feed on plankton and nonliving organic matter.... So the answer is [(G)]


[User]
_ lack respiratory and excretory systems.
Options:
- (A) graptolites
- (B) insects
- (C) ferns
- (D) barnacles
- (E) fossil fuels
- (F) Allergies
- (G) starfish
- (H) parasites Let's be accurate as possible.

[Assistant]
Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems.
The final answer: (G).


[User]
Bromeliads and cacti have adapted to very _ environments.
Options:
- (A) dry
- (B) wet
- (C) arid
- (D) cold
- (E) UV
- (F) warm
- (G) humid
- (H) fern
--
Let's think first: Plants that are adapted to very dry environments are called xerophytes. Bromeliads and cacti are xerophytes. Bromeliads and cacti have adapted to very dry environments.... So the answer is [(A)]
What do all chemical changes require to occur?
Options:
- (A) during the day
- (B) heating liquids
- (C) Activation energy
- (D) wavelengths and photons
- (E) Burning fuel and air
- (F) kinetic energy
- (G) electromagnetic energy
- (H) direct energy
--
Let's think first: All chemical reactions require activation energy to get started. Chemical changes are a result of chemical reactions. All chemical changes require activation energy to occur.... So the answer is [(C)]
Male dogs use_ in urine to mark their territory.
Options:
- (A) ammonia
- (B) Chemical energy
- (C) proteins
- (D) semiochemicals
- (E) animals
- (F) heat produced
- (G) nitric oxide
- (H) They have thick fur
--
Let's think first: Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use semiochemicals in urine to mark their territory.... So the answer is [(D)]
What water dweller can be stimulated with amphetamines?
Options:
- (A) pearls
- (B) algae
- (C) swea
- (D) otters
- (E) fish
- (F) humans
- (G) sharks
- (H) sponges
--
Let's think first: Fish have a centralized nervous system with a brain. Amphetamines stimulate the central nervous system. Fish can be stimulated with amphetamines.... So the answer is [(E)]
Changing the structure of a chromosome can be what to an organsim?
Options:
- (A) massive damage
- (B) mechanical
- (C) beneficial
- (D) harm them
- (E) negative
- (F) dangerous
- (G) homogenous
- (H) Damages them
--
Let's think first: Mutations may change the structure of a chromosome or just change a single nucleotide. Most mutations are beneficial to the organism. Changing the structure of a chromosome can be beneficial to the organism.... So the answer is [(C)]
What has a circulatory system with a two-chambered heart?
Options:
- (A) sharks
- (B) insects
- (C) salmon
- (D) animals
- (E) barnacles
- (F) mammals
- (G) tortoises
- (H) alpacas
--

[Assistant] Let's think first: Fish have a circulatory system with a two-chambered heart. Fish include bass and salmon. Salmon have a circulatory system with a two-chambered heart.... So the answer is [(C)]


[User]
Macroevolution occurs how above the level of the species.
Options:
- (A) swiftly
- (B) slowly
- (C) quickly
- (D) forces
- (E) never
- (F) ferns
- (G) animals
- (H) three
--
Let's think first: Macroevolution occurs over geologic time above the level of the species. And geologic time is very, very slow. Macroevolution occurs very, very slowly above the level of the species.... So the answer is [(B)]
------
What do snails and slugs lack?
Options:
- (A) eyes
- (B) a nervous system
- (C) kinetic energy
- (D) Chlorophyll
- (E) Energy.
- (F) life
- (G) a backbone
- (H) Energy
--
Let's think first: Invertebrates are animals that lack a vertebral column, or backbone. Snails and slugs are invertebrates. Snails and slugs lack a backbone.... So the answer is [(G)]
------
How do ost frogs breathe as tadpoles?
Options:
- (A) gills
- (B) sucking in air
- (C) oxygen
- (D) lungs
- (E) ligt
- (F) nektar
- (G) skin
- (H) ovaries
--
Let's think first: Most amphibians breathe with gills as larvae and with lungs as adults. Frogs are the most durable of the amphibians. Most frogs breathe with gills as larvae and with lungs as adults.... So the answer is [(A)]
------
Something that helps prevent hypothermia:
Options:
- (A) dehydration
- (B) freezing
- (C) water
- (D) head hair
- (E) cold
- (F) electricity
- (G) Exfoliation
- (H) sweating
--

[Assistant]
Let's think first: Head hair is especially important in preventing heat loss from the body. Hypothermia Loss of body heat caused by exposure is called Hypothermia. Head hair is especially important in preventing hypothermia.... So the answer is [(D)]
------


[User]
(question). Marine annelids can make a swimming larvae called what?
Options:
- (A) barnacles
- (B) survive
- (C) graptolites
- (D) epidermal
- (E) Something to move
- (F) a trochophore
- (G) fertile
- (H) permineralization
(answer). Adult worms go through a major transformation to develop reproductive organs. Marine annelid worms have larvae called trochophores that swim about by means of cilia. Marine annelids go through a major transformation to be able to make larvae called trochophores that swim about by means of cilia.
The answer is (F)

(question). How do cells grow and repair themselves?
Options:
- (A) mitosis
- (B) alveoli
- (C) retina
- (D) rest
- (E) recovery
- (F) exercise
- (G) ligt
- (H) mechanical
(answer). Cell division is how organisms grow and repair themselves. Mitosis is cell division. Organisms grow and repair themselves through mitosis.
The answer is (A)

(question). What can happen to a population when animals begin to migrate?
Options:
- (A) It expands
- (B) harm them
- (C) it can change species
- (D) Move to another area
- (E) it can eat more
- (F) it can go extinct
- (G) it can fluctuate
- (H) Plant growth is reduced
(answer). Migration is a type of movement that changes population size. Population viability Population sizes are under constant fluctuation. Migration is a type of movement that causes a population to fluctuate.
The answer is (G)

(question). Changing the structure of a chromosome can be what to an organsim?
Options:
- (A) massive damage
- (B) mechanical
- (C) beneficial
- (D) harm them
- (E) negative
- (F) dangerous
- (G) homogenous
- (H) Damages them
(answer).

[Assistant]
Mutations may change the structure of a chromosome or just change a single nucleotide. Most mutations are beneficial to the organism. Changing the structure of a chromosome can be beneficial to the organism.
The answer is (C)


[User]
Q: The most primitive multi-cellular animals produce what?
Options:
- (A) Electrical energy
- (B) eggs and sperm
- (C) harmful substances
- (D) scarce resources
- (E) Organic compounds
- (F) Chemical energy
- (G) fur and fat
- (H) aerobic capacity
A: So, my chain of thought: Adult sponges produce eggs and sperm. Sponges are the most primitive multicellular animals. The most primitive multi-cellular animals produce eggs and sperm. The answer is (B).

Q: What forms when molecules react with one another?
Options:
- (A) biochemistry
- (B) Chemical energy
- (C) Energy.
- (D) atoms
- (E) chemical bonds
- (F) elements
- (G) flow of electrons
- (H) Organic compounds
A: So, my chain of thought: Chemical bonds form when substances react with one another. All substances are composed of molecules. Chemical bonds form when molecules react with one another. The answer is (E).

Q: All animals are what?
Options:
- (A) consumers
- (B) all matter
- (C) insects
- (D) aquatic
- (E) plants
- (F) furry
- (G) parasites
- (H) infected
A:

[Assistant] So, my chain of thought: All animals are heterotrophs. All consumers are also called Heterotrophs. All animals are consumers. The answer is (A).


[User]
What gets converted into the type of energy that animal cells need?
Options:
- (A) photosynthesis
- (B) solar energy
- (C) sugar
- (D) UV
- (E) food
- (F) water
- (G) Energy
- (H) Light
--
Let's think first: Glucose is used for energy by the cells of most organisms. Food is converted into glucose. Food is converted into the type of energy that most cells use.... So the answer is [(E)]

What does a hairy organism have under its skin to help insulate the body?
Options:
- (A) fat
- (B) hair
- (C) food
- (D) cell
- (E) nerves
- (F) coat
- (G) fur
- (H) marrow
--
Let's think first: Mammals have a layer of fat under the skin to help insulate the body. If it has hair it is a mammal. An organism with hair has a layer of fat under the skin to help insulate the body.... So the answer is [(A)]

How do ost frogs breathe as tadpoles?
Options:
- (A) gills
- (B) sucking in air
- (C) oxygen
- (D) lungs
- (E) ligt
- (F) nektar
- (G) skin
- (H) ovaries
--

[Assistant] Let's think first: Most amphibians breathe with gills as larvae and with lungs as adults. Frogs are the most durable of the amphibians. Most frogs breathe with gills as larvae and with lungs as adults.... So the answer is [(A)]


[User]
Let's think step by step! What is an example of an entity that can live on in a completely inactive state?
Options:
- (A) an object
- (B) sloths
- (C) hibernating bears
- (D) Conifers
- (E) chickenpox
- (F) barnacles
- (G) a fish
- (H) mammals
The thinking starts now:

[Assistant] Some viruses live in a dormant state inside the body. After an episode of chickenpox, the virus becomes dormant in the body. Chicken pox can live in an inactive state. The final answer: (E).


[User]
Meiosis is the type of cell division that produces:
Options:
- (A) animals
- (B) Plant reproduction
- (C) Most plants
- (D) peachleaf willow
- (E) Plants growth
- (F) haploid cells
- (G) spread flower seeds
- (H) rapid expansion
Hmmm, let me think. I don't want to be wrong, so I got to be careful.

[Assistant] Meiosis is the type of cell division that produces gametes. Gametes are haploid egg or sperm that fuse to form a zygote. Meiosis is the type of cell division that produces haploid cells. The answer: (F).


[User]
[[Ques]]: What does head hair prevent the loss of?
Options:
- (A) matter
- (B) chemicals
- (C) energy
- (D) sunlight
- (E) Nutrients
- (F) warmth
- (G) humidity
- (H) sweating
[[Ans]]: [Head hair is especially important in preventing heat loss from the body. Basically, heat is energy. Head hair is especially important in preventing energy loss from the body.]
[(C)]

[[Ques]]: Arthropods have a life cycle with what?
Options:
- (A) rapid expansion
- (B) survival
- (C) aerobic capacity
- (D) food and shelter
- (E) an organism's body
- (F) reproduce
- (G) barnacles
- (H) mixing genes up
[[Ans]]: [Arthropods have a life cycle with sexual reproduction. Sexual reproduction mixes the genes up more than is possible with asexual reproduction. Arthropods have a life cycle with mixing genes up.]
[(H)]

[[Ques]]: What has a range of sexual reproductive systems?
Options:
- (A) Computer systems.
- (B) Most plants
- (C) animals
- (D) Roundworms.
- (E) mammals
- (F) Art reproductions.
- (G) insects
- (H) Stuffed toy bears.
[[Ans]]:

[Assistant]
[Roundworms make up the phylum Nematoda. Within the Nematoda, a range of reproductive systems occur. A range of reproductive systems occur in roundworms.]
[(D)]


[User]
Question to you: What contains the green pigment chlorophyll?
Options:
- (A) seeds
- (B) orchids
- (C) barnacles
- (D) cacti
- (E) plastids
- (F) ferns
- (G) Most plants
- (H) bioaerosols.
Let's reason step-by-step:

[Assistant] Chloroplasts contain the green pigment chlorophyll. Chloroplasts are the most familiar plastids. Plastids contain the green pigment chlorophyll. Final answer: (E).


[User]
Use reasoning to answer the following question. What is an example of a tetrapod vertebrate that produces amniotic eggs.
Options:
- (A) animals
- (B) tortoises
- (C) crocodiles
- (D) barnacles
- (E) insects
- (F) parasites
- (G) Lizards
- (H) a fish

[Assistant]
Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. All lizards are reptiles. Lizards are tetrapod vertebrates that produce amniotic eggs.
So, the answer is (G).


[User]
What can be caused by direct or passive inhalation?
Options:
- (A) skin grafts
- (B) prolonged thirst
- (C) science
- (D) Toxicity
- (E) lung cancer
- (F) negative
- (G) friction
- (H) craters
--
Let's think first: Lung cancer is most often caused by exposure to tobacco smoke. Smoke Tobacco smoke , whether directly or passively inhaled, has been shown to worsen asthma. Lung cancer can be caused by direct or passive inhalation.... So the answer is [(E)]
What is generally similar across species?
Options:
- (A) tail fins
- (B) our star
- (C) the eyes
- (D) vision
- (E) mating
- (F) Flowers
- (G) bushes
- (H) alpacas
--
Let's think first: Mating is generally preceded by courtship. Courtship is similar across species. Mating is generally similar across species.... So the answer is [(E)]
Oncogenes promote the division of cells using the damaged form of what?
Options:
- (A) deoxyribonucleic acid
- (B) oncogenes
- (C) proteins
- (D) Chemical energy
- (E) epidermis and dermis
- (F) the body's largest organ
- (G) Veins and arteries.
- (H) healthy cells
--
Let's think first: Oncogenes promote the division of cells with damaged DNA. DNA DNA is deoxyribonucleic acid. Oncogenes promote the division of cells with damaged deoxyribonucleic acid.... So the answer is [(A)]
Many corals secrete what to form a coral reef?
Options:
- (A) Chlorophyll
- (B) salt and water.
- (C) The area was once underwater
- (D) Chemical energy
- (E) aqueous solution
- (F) Organic compounds
- (G) gastropod shells
- (H) hard outer covering
--
Let's think first: Many corals secrete an exoskeleton that builds up to become a coral reef. An insect has a hard outer covering called an exoskeleton. Many corals secrete a hard outer covering that builds up to become a coral reef.... So the answer is [(H)]
What can use photosynthesis?
Options:
- (A) fungi
- (B) grass
- (C) fish
- (D) vegetation
- (E) flowers
- (F) vertebrates
- (G) plant life
- (H) plants
--
Let's think first: Fungi lack chlorophyll, so they cannot make food by photosynthesis as plants can. Solar energy is absorbed by chlorophyll. Fungi cannot absorb solar energy and cannot make food by photosynthesis as plants can.... So the answer is [(E)]
What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) Heat energy
- (B) salt and water
- (C) acetic acid
- (D) urine
- (E) ice
- (F) Chlorophyll
- (G) white vinegar
- (H) blood
--

[Assistant] Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. Sweat is made of salt and water. Water and salt wets the skin, and when it evaporates, it cools the body.... So the answer is [(B)]


[User]
Marine biomes are found in large bodies of what?
Options:
- (A) fresh water
- (B) the environment
- (C) salt water
- (D) liquid
- (E) river water
- (F) Absorb light
- (G) Sediment
- (H) black water
--
Let's think first: Marine biomes are found in the salt water of the ocean. An ocean is a large body of salt water. Marine biomes are found in large bodies of salt water.... So the answer is [(C)]
What stimulates the reproductive organs to develop into male organs?
Options:
- (A) Something coming from a gland
- (B) Chemical energy
- (C) A compound that donates proton
- (D) certain anabolic hormones
- (E) Something made from fermented ricce
- (F) Electrical energy
- (G) heat produced
- (H) sensory neurons
--
Let's think first: Testosterone stimulates the reproductive organs to develop into male organs. Examples of anabolic hormones are testosterone and nandrolone. Certain anabolic hormones stimulate the reproductive organs to develop into male organs.... So the answer is [(D)]
Cells obtain energy from the blood with the help of
Options:
- (A) sweating
- (B) batteries
- (C) pancreas
- (D) electron
- (E) insulin
- (F) alveoli
- (G) oxygen
- (H) sunlight
--
Let's think first: Insulin helps cells take up glucose from the blood. Blood Glucose Blood Glucose Glucose is the principal source of energy for mammalian cells. Insulin helps cells take up energy from the blood.... So the answer is [(E)]
What can a certain protein affect in meat?
Options:
- (A) health
- (B) piousness
- (C) stamina
- (D) retina
- (E) toughness
- (F) liveliness
- (G) saltiness
- (H) Energy
--
Let's think first: Cartilage is a tough tissue that contains a protein called collagen. Collagen contributes to meat toughness. A protein contributes to meat toughness.... So the answer is [(E)]
Adult sponges produce sperm and what other sex cell?
Options:
- (A) testicles
- (B) it needs them
- (C) gastropod shells
- (D) fertile
- (E) testosterone
- (F) zygotes
- (G) female gametes
- (H) barnacles
--
Let's think first: Adult sponges produce eggs and sperm. Each ovule usually contains one egg , the female gamete or sex cell. Adult sponges produce female gametes and sperm.... So the answer is [(G)]
What happens in the archegonium?
Options:
- (A) eggs separate
- (B) Earth orbiting the Sun
- (C) sperm and egg fuse
- (D) competition
- (E) fallopian tubes join
- (F) permineralization
- (G) It expands
- (H) cloning
--

[Assistant] Let's think first: Fertilization occurs when sperm swim to an egg inside an archegonium. Fertilization occurs when the egg and sperm fuse and join. An egg and sperm can fuse when sperm swim to an egg inside an archegonium.... So the answer is [(C)]


[User]
Molecules of _ bring the building blocks of protein to the ribosomes in the correct sequence.
Options:
- (A) form
- (B) fusion
- (C) core
- (D) shape
- (E) sugar
- (F) HIV
- (G) tRNA
- (H) small
--
Let's think first: Molecules of tRNA bring amino acids to the ribosome in the correct sequence. Amino Acids Amino acids are the building blocks of proteins. Molecules of tRNA bring the building blocks of proteins to the ribosome in the correct sequence.... So the answer is [(G)]
Echinoderms are resistant to some:
Options:
- (A) starfish
- (B) enzymes
- (C) Toxicity
- (D) pesticide
- (E) parasites
- (F) toxins
- (G) boats
- (H) chemicals
--
Let's think first: Echinoderms lack a centralized nervous system. From animal experiments, it seems to be a central nervous system toxin. Echinoderms are resistant to some toxins.... So the answer is [(F)]
Meiosis is the type of cell division that produces:
Options:
- (A) animals
- (B) Plant reproduction
- (C) Most plants
- (D) peachleaf willow
- (E) Plants growth
- (F) haploid cells
- (G) spread flower seeds
- (H) rapid expansion
--
Let's think first: Meiosis is the type of cell division that produces gametes. Gametes are haploid egg or sperm that fuse to form a zygote. Meiosis is the type of cell division that produces haploid cells.... So the answer is [(F)]
What gets organic compounds from dead organisms?
Options:
- (A) plants
- (B) elms
- (C) mud
- (D) molds
- (E) dead cats
- (F) cows
- (G) trees
- (H) sludge
--
Let's think first: Most fungi get organic compounds from dead organisms. Molds are microscopic fungi. Molds get organic compounds from dead organisms.... So the answer is [(D)]
What lack respiratory and excretory systems?
Options:
- (A) They may not survive.
- (B) members of their own species
- (C) platypus
- (D) humans
- (E) crinoids and blastoids
- (F) passenger pigeons
- (G) graptolites
- (H) whales
--
Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms in the diorama include the crinoids and blastoids. Crinoids and blastoids lack respiratory and excretory systems.... So the answer is [(E)]
How is survival ensured around hydrothermal vents?
Options:
- (A) heat produced
- (B) Eating a lot
- (C) Reproducing quickly
- (D) biological diversity
- (E) vegetation
- (F) Being in a cluster
- (G) Staying far apart
- (H) hydrate their cells
--

[Assistant] Let's think first: Organisms cluster around hydrothermal vents in the ocean floor. To survive, some organisms living near hydrothermal vents have formed close associations. Clusters form around hydrothermal vents to ensure survival.... So the answer is [(F)]


[User]
Let's think step by step! Which animal has a circulatory system with a three-chambered heart?
Options:
- (A) animals
- (B) Salamander
- (C) fur seals
- (D) mammals
- (E) alpacas
- (F) a fish
- (G) warm-blooded
- (H) barnacles
The thinking starts now:

[Assistant] Amphibians have a relatively complex circulatory system with a three-chambered heart. Frogs, toads and salamanders are amphibians. Salamanders have a relatively complex circulatory system with a three-chambered heart. The final answer: (B).


[User]
[Q] What causes human disease?
Options:
- (A) HPV
- (B) UV
- (C) minerals
- (D) Tamiflu
- (E) mold
- (F) HIV
- (G) human growth
- (H) CFCs
[A] Here's my solution: Viruses cause many human diseases. Examples include influenza, rabies, HIV, and Herpes viruses. Influenza causes human disease. The answer is (F).

[Q] What is a tree with a woody trunk?
Options:
- (A) conifer
- (B) orchids
- (C) plants
- (D) trees
- (E) less water
- (F) vines
- (G) lycophytes
- (H) ferns
[A] Here's my solution: Most modern gymnosperms are trees with woody trunks. Conifers are examples of gymnosperms. Conifers are trees with woody trunks. The answer is (A).

[Q] What helps prokaryotes move?
Options:
- (A) sensory neurons
- (B) heat energy
- (C) Feet.
- (D) Wheels.
- (E) Hair-like projections.
- (F) Moving vans.
- (G) Chemical energy
- (H) kinetic energy
[A] Here's my solution: Flagella help prokaryotes move. Flagella are hair-like projections from the surface of cells. Hair-like projections from the surface of cells that help prokaryotes move. The answer is (E).

[Q] What is the major thing that biological membranes consist of?
Options:
- (A) chemicals
- (B) glucose
- (C) lipids
- (D) Energy
- (E) complex
- (F) oxygen
- (G) matter
- (H) an ion
[A]

[Assistant] Here's my solution: Lipids may consist of fatty acids alone, or they may contain other molecules as well. All biological membranes contain lipids as the major constituent. All biological membranes have lipids as the main consituent which consist of fatty acids. The answer is (C).


[User]
Q: The mature form of what kind of cell secretes antibodies?
Options:
- (A) more abundant
- (B) it needs them
- (C) positive
- (D) graptolites
- (E) A Greek letter
- (F) barnacles
- (G) B-lymphocytes
- (H) homogenous
Let's think step by step below.

[Assistant]
Plasma cells are activated B cells that secrete antibodies. Plasma Cells Plasma Cells Plasma cells are the mature form of B-lymphocytes. Mature forms of B-lymphocytes secrete antibodies.
Thus, the answer is (G).


[User]
Q: What is the process by which organisms give rise to their young?
Options:
- (A) Summer
- (B) cell division
- (C) autumn
- (D) Plants growth
- (E) peachleaf willow
- (F) ejaculation
- (G) reproduction
- (H) mating rituals
Let's think step by step below.

[Assistant]
Reproduction is the process by which organisms give rise to offspring. Fetus is Latin for offspring or young one. Reproduction is the process by which organisms give rise to their young.
Thus, the answer is (G).


[User]
q: What are attached permanently?
Options:
- (A) Veins and arteries.
- (B) sensory neurons
- (C) barnacles
- (D) tadpoles
- (E) seahorses
- (F) alligators
- (G) adult sponges
- (H) an organism's body
a: (G)... Explanation: Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are attached permanently and cannot move. That's why the answer is (G).

q: What is one thing viruses do not cause?
Options:
- (A) disease
- (B) AIDS
- (C) illness
- (D) cancer
- (E) Ebola
- (F) fever
- (G) death
- (H) smallpox
a: (D)... Explanation: Populations of viruses do not grow through cell division because they are not cells. Cancer is unregulated cell division. Cancer is not caused by viruses. That's why the answer is (D).

q: Salt in the water is something that must be adapted to by organisms who live in:
Options:
- (A) evaporation
- (B) environment
- (C) rivers
- (D) bioaerosols
- (E) our planet
- (F) Deposition
- (G) estuaries
- (H) deserts
a: (G)... Explanation: Organisms that live in marine biomes must be adapted to the salt in the water. Estuaries display characteristics of both marine and freshwater biomes. Organisms that live in estuaries must be adapted to the salt in the water. That's why the answer is (G).

q: Endocrine hormones move from place to place through the
Options:
- (A) animals
- (B) ovaries
- (C) Man
- (D) humans
- (E) blood
- (F) hair
- (G) skin
- (H) scales
a:

[Assistant] (E)... Explanation: Endocrine hormones travel throughout the body in the blood. For the tourists, there are many places to travel. Endocrine hormones move from place to place in the body through the blood. That's why the answer is (E).


[User]
Why does vesicle transport need energy?
Options:
- (A) it helps plants in growing
- (B) to prevent movement
- (C) for movement of substances
- (D) during the day
- (E) Transfers energy
- (F) flow of electrons
- (G) to breath
- (H) magnetism
--
Let's think first: Vesicle transport requires energy, so it is also a form of active transport. Active transport involves movement of substances against a chemical gradient. Vesicle transport requires energy for movement of substances against a chemical gradient.... So the answer is [(C)]
An animal that travels long distances is
Options:
- (A) brown bear
- (B) dangerous
- (C) Riding a bike
- (D) warm-blooded
- (E) a barn swallow
- (F) supersonic
- (G) ground squirrel
- (H) mountain gorilla
--
Let's think first: Migrants typically travel long distances. Barn swallows are Neotropical migrants. Barn swallows travel long distances.... So the answer is [(E)]
Organelles that come in pairs are involved in what?
Options:
- (A) movement
- (B) Veins and arteries.
- (C) competition
- (D) Plants growth
- (E) Animal survival
- (F) cell division
- (G) an organism's body
- (H) Plant reproduction
--
Let's think first: Centrioles are organelles involved in cell division. Centrioles come in pairs. Organelles that come in pairs are involved in cell division.... So the answer is [(F)]
What sea creature reproduces without gamete fusion?
Options:
- (A) white
- (B) amoeba
- (C) embryos
- (D) a fish
- (E) alpacas
- (F) swea
- (G) Schwinn
- (H) polyp
--
Let's think first: Polyps usually reproduce asexually. Plants with Asexual Reproduction Plants with asexual reproduction have no gamete fusion. Polyps reproduce with no gamete fusion.... So the answer is [(H)]
What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) Heat energy
- (B) salt and water
- (C) acetic acid
- (D) urine
- (E) ice
- (F) Chlorophyll
- (G) white vinegar
- (H) blood
--
Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. Sweat is made of salt and water. Water and salt wets the skin, and when it evaporates, it cools the body.... So the answer is [(B)]
Splitting into what is the final stage of cell division in eukaryotes as well as prokaryotes?
Options:
- (A) fewer cells
- (B) merged cells
- (C) two cells
- (D) Chlorophyll
- (E) five cells
- (F) autumn
- (G) allow growth
- (H) Leptospirosis
--

[Assistant] Let's think first: Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes. During cytokinesis , the cell body splits into two cells. Splitting into two cells is the final stage of cell division in eukaryotes as well as prokaryotes.... So the answer is [(C)]


[User]
What is a major food source for other organisms, including humans?
Options:
- (A) gastropod shells
- (B) orchids
- (C) invertebrates
- (D) swamp vegetation
- (E) Most plants
- (F) insects
- (G) barnacles
- (H) animals Let's solve this problem gradually.

[Assistant] Mollusks are a major food source for other organisms, including humans. Mollusks are invertebrates and are no exception. Invertebrates are a major food source for other organisms, including humans. So the final answer is (C).


[User]
Organisms in a marine biome must be be adapted to what in the water?
Options:
- (A) mud
- (B) Nutrients
- (C) sodium
- (D) toxins
- (E) motion
- (F) sugar
- (G) energy
- (H) an anion
--
Let's think first: Organisms that live in marine biomes must be adapted to the salt in the water. Another name for salt is sodium. Organisms that live in marine biomes must be adapted to the sodium in the water.... So the answer is [(C)]
Organisms that live in the ocean are adapted to
Options:
- (A) purified water
- (B) the environment
- (C) Absorb light
- (D) air
- (E) survival
- (F) salt water
- (G) murky water
- (H) produce light
--
Let's think first: Organisms that live in marine biomes must be adapted to the salt in the water. Some familiar examples of biomes include tundra, desert, chaparral, and open ocean. Organisms that live in the ocean must be adapted to the salt water.... So the answer is [(F)]
The most primitive multi-cellular animals produce what?
Options:
- (A) Electrical energy
- (B) eggs and sperm
- (C) harmful substances
- (D) scarce resources
- (E) Organic compounds
- (F) Chemical energy
- (G) fur and fat
- (H) aerobic capacity
--
Let's think first: Adult sponges produce eggs and sperm. Sponges are the most primitive multicellular animals. The most primitive multi-cellular animals produce eggs and sperm.... So the answer is [(B)]
What do dogs use to mark their territory?
Options:
- (A) water
- (B) Chemicals
- (C) layers of fat
- (D) food
- (E) Animal fur
- (F) heat energy
- (G) Scratches
- (H) heat produced
--
Let's think first: Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use chemicals to mark their territory.... So the answer is [(B)]
How do starfish communicate with each other?
Options:
- (A) huddle together
- (B) writing
- (C) during the day
- (D) pheromones
- (E) Chemical energy
- (F) waving their arms
- (G) Decibels
- (H) talking
--
Let's think first: Echinoderms use pheromones to communicate with each other. Echinoderms are represented by the starfish. Starfish use pheromones to communicate with each other.... So the answer is [(D)]
Carrots and beets what in length and width from primary and secondary meristem?
Options:
- (A) grow shorter
- (B) grow smaller
- (C) grow bigger
- (D) peachleaf willow
- (E) grow narrower
- (F) they bend
- (G) In their leaves
- (H) rapid expansion
--

[Assistant] Let's think first: Roots grow in length and width from primary and secondary meristem. For example, carrots and beets are roots. Carrots and beets grow in length and width from primary and secondary meristem.... So the answer is [(C)]


[User]
Alternation of generations allows for different methods of producing:
Options:
- (A) genders
- (B) music
- (C) Chlorophyll
- (D) trees
- (E) Plants growth
- (F) offspring
- (G) rays or beams
- (H) infection Let's be accurate as possible.

[Assistant]
Alternation of generations allows for both asexual and sexual reproduction. Asexual reproduction gives offspring similar to parents. Alternation of generations allows for different methods of producing offspring.
The final answer: (F).


[User]
Phylum platyhelminthes are mostly what?
Options:
- (A) animals
- (B) engorged
- (C) fungi
- (D) infected
- (E) parasitic
- (F) insects
- (G) huge
- (H) free living
--
Let's think first: Flatworms belong to the phylum Platyhelminthes. Most of the flatworms are parasitic, although the Turbellaria are free-living in fresh water. Phylum Platyhelminthes are mostly parasitic.... So the answer is [(E)]
Secondary vascular tissues are employed by bamboo and what other kind of tree?
Options:
- (A) plants
- (B) ferns
- (C) grass
- (D) coniferous
- (E) Trees
- (F) elms
- (G) palm
- (H) deciduous
--
Let's think first: Secondary growth forms secondary vascular tissues and bark. Some, such as bamboo and palm trees, have secondary growth. Secondary vascular tissues are employed by bamboo and palm trees.... So the answer is [(G)]
What causes human disease?
Options:
- (A) HPV
- (B) UV
- (C) minerals
- (D) Tamiflu
- (E) mold
- (F) HIV
- (G) human growth
- (H) CFCs
--
Let's think first: Viruses cause many human diseases. Examples include influenza, rabies, HIV, and Herpes viruses. Influenza causes human disease.... So the answer is [(F)]
What do male dogs use in urine to mark their territory?
Options:
- (A) Natural aphrodisiacs
- (B) competing for resources
- (C) Tails
- (D) Urine cleaner
- (E) Something coming from a gland
- (F) Chemical energy
- (G) an area swollen with pus
- (H) Chew toys
--
Let's think first: Male dogs use pheromones in urine to mark their territory. Pheromones are natural aphrodisiacs. Male dogs use natural aphrodisiacs in urine to mark their territory.... So the answer is [(A)]
Viruses cannot do what by themselves?
Options:
- (A) make people sick
- (B) survive
- (C) dangerous
- (D) interact with cells
- (E) migrate
- (F) kill them
- (G) cause a viral infection
- (H) multiply
--
Let's think first: Viruses cannot reproduce by themselves. Passwords multiply and reproduce amongst themselves. Viruses cannot multiply by themselves.... So the answer is [(H)]
What clusters around the heat of submarine volcanoes?
Options:
- (A) ferns
- (B) organisms
- (C) vegetation
- (D) humans
- (E) emissions
- (F) Energy
- (G) insects
- (H) the sun
--

[Assistant] Let's think first: Organisms cluster around hydrothermal vents in the ocean floor. Hydrothermal vents are powered by the heat of submarine volcanoes. Organisms cluster around the heat of submarine volcanoes.... So the answer is [(B)]


[User]
Which chemical controls sexual development and reproduction in females?
Options:
- (A) acetic acid
- (B) Hemoglobin
- (C) Fructose
- (D) barnacles
- (E) animals
- (F) Estrogen
- (G) Pesticides
- (H) Baby spray Let's solve this problem gradually.

[Assistant] Sex hormones are chemical messengers that control sexual development and reproduction. Estrogens are female sex hormones. Estrogen controls sexual development and reproduction in females. So the final answer is (F).


[User]
What is a diploid zygote the result of?
Options:
- (A) photosynthesis
- (B) Plant reproduction
- (C) diploid sperm and egg
- (D) mate with females
- (E) Leptospirosis
- (F) haploid sperm and egg
- (G) triploid sperm and egg
- (H) two haploid eggs OK. Let's think hard:

[Assistant]
Gametes then unite in fertilization and form a diploid zygote. Gametes are haploid egg or sperm that fuse to form a zygote. Diploid zygotes are the result of a haploid sperm and egg combining.
So, the final answer is (F).


[User]
What kicks in after a certain number of divisions?
Options:
- (A) Energy.
- (B) antibiotics
- (C) Energy
- (D) separation
- (E) nerves
- (F) apoptosis
- (G) soccer leagues
- (H) Plants growth
--
Let's think first: Cells are programmed to divide only a set number of times. Apoptosis is programed cell death. Division can only happen a certain number of times before apoptosis kicks in.... So the answer is [(F)]
The type of supportive community that lions live in is called what?
Options:
- (A) neighborhood
- (B) good
- (C) a pride
- (D) warm
- (E) group
- (F) the Lion's Club
- (G) complex
- (H) positive
--
Let's think first: Lions live in social groups called prides. Social cohesion Social support, informal neighbourhood groups, community help groups. Lions live in supportive communities called prides.... So the answer is [(C)]
What can slowly dissolve carbon in sedimentary rock?
Options:
- (A) hydrocarbons
- (B) acetic acid
- (C) precipitation
- (D) evaporation
- (E) rivers and streams
- (F) puddles
- (G) ponds
- (H) nitrogen
--
Let's think first: Flowing water can slowly dissolve carbon in sedimentary rock. Rivers and streams are bodies of fresh, flowing water. Rivers and streams can slowly dissolve carbon in sedimentary rock.... So the answer is [(E)]
Saltwater excretion reduces what?
Options:
- (A) emissions
- (B) dehydration
- (C) light energy
- (D) bacteria
- (E) sweat
- (F) energy usage
- (G) evaporation
- (H) body heat
--
Let's think first: Sweating reduces body heat. Sweat is made of salt and water. Saltwater excretion reduces body heat.... So the answer is [(H)]
Meiosis is the type of cell division that produces:
Options:
- (A) animals
- (B) Plant reproduction
- (C) Most plants
- (D) peachleaf willow
- (E) Plants growth
- (F) haploid cells
- (G) spread flower seeds
- (H) rapid expansion
--
Let's think first: Meiosis is the type of cell division that produces gametes. Gametes are haploid egg or sperm that fuse to form a zygote. Meiosis is the type of cell division that produces haploid cells.... So the answer is [(F)]
_ is how organisms grow and repair themselves.
Options:
- (A) complex
- (B) recycling
- (C) properties
- (D) fusion
- (E) fission
- (F) bacteria
- (G) Mitosis
- (H) potatoes
--

[Assistant] Let's think first: Cell division is how organisms grow and repair themselves. Mitosis is cell division. Mitosis is how organisms grown and repair themselves.... So the answer is [(G)]


[User]
[Q] Natural selection results in:
Options:
- (A) insects
- (B) root growth
- (C) Plants growth
- (D) Animal survival
- (E) animals
- (F) Plant reproduction
- (G) mammals
- (H) specialization
[A] Here's my solution: Specialization occurs when competing species evolve different adaptations. Adaptation is the result of natural selection. Specialization is a result of natural selection. The answer is (H).

[Q] What provides food and shelter to many ocean organisms?
Options:
- (A) It helps them survive
- (B) Something formed from skeleton
- (C) sedimentary rocks
- (D) important habitats
- (E) Something with a head, thorax, and abdomen
- (F) it protects them
- (G) gastropod shells
- (H) in their habitats
[A] Here's my solution: Coral reefs provide food and shelter to many ocean organisms. Coral reefs are formed from coral skeletons. Something formed from skeletons provide food and shelter to many ocean organisms. The answer is (B).

[Q] Chromosomes contain genes, which code for
Options:
- (A) Most plants
- (B) Plants growth
- (C) body tissue
- (D) Animal survival
- (E) animals
- (F) Chemical energy
- (G) peachleaf willow
- (H) A Greek letter
[A] Here's my solution: Chromosomes contain genes, which code for proteins. Protein builds and repairs body tissue. Chromosomes contain genes, which code for body tissue. The answer is (C).

[Q] Caffeine can cause
Options:
- (A) congestion
- (B) anemia
- (C) constipation
- (D) sweating
- (E) hives
- (F) energy usage
- (G) dehydration
- (H) heat energy
[A]

[Assistant] Here's my solution: Caffeine is a central nervous system stimulant. Stimulants can cause overheating and dehydration. Caffeine can cause dehydration. The answer is (G).


[User]
What does a diaphragm help a dolphin do?
Options:
- (A) swimming
- (B) rest
- (C) stay warm
- (D) smell
- (E) see
- (F) breathe
- (G) eat
- (H) survive
--
Let's think first: Mammals breathe with the help of a diaphragm. Common dolphins are mammals. Dolphins breathe with the help of a diaphragm.... So the answer is [(F)]
What do plants build their cell walls from?
Options:
- (A) By wind and rain
- (B) Deposition
- (C) Deposition.
- (D) algae
- (E) Chemical energy
- (F) plant wall
- (G) plant material
- (H) polysaccharides
--
Let's think first: Plants use cellulose for their cell walls. Another important polysaccharide is cellulose. Plants use a polysaccharide for their cell walls.... So the answer is [(H)]
What is needed from cells for phosphatases to keep the proper ph?
Options:
- (A) plasma
- (B) secretion of bases only
- (C) secretion of proteins
- (D) metabolic reaction
- (E) it helps plants in growing
- (F) Positive charges
- (G) Transfers energy
- (H) secretion of acids and bases
--
Let's think first: Cells secrete acids and bases to maintain the proper pH for enzymes to work. Phosphatases are enzymes that remove phosphates from other enzymes. Cells secrete acids and bases to keep the proper pH for phosphatases to work properly.... So the answer is [(H)]
What is an example of an entity that can live on in a completely inactive state?
Options:
- (A) an object
- (B) sloths
- (C) hibernating bears
- (D) Conifers
- (E) chickenpox
- (F) barnacles
- (G) a fish
- (H) mammals
--
Let's think first: Some viruses live in a dormant state inside the body. After an episode of chickenpox, the virus becomes dormant in the body. Chicken pox can live in an inactive state.... So the answer is [(E)]
Where do all adult echinoderms live?
Options:
- (A) soil
- (B) desert
- (C) freshwater
- (D) fossils
- (E) water
- (F) Earth
- (G) small
- (H) aquariums
--
Let's think first: Adult echinoderms have radial symmetry. All animals with radial symmetry live in water. All adult echinoderms live in water.... So the answer is [(E)]
Earthworm bodies are:
Options:
- (A) fertile
- (B) segmented
- (C) migrate
- (D) allow growth
- (E) revolving
- (F) more abundant
- (G) Loose
- (H) Absorb light
--

[Assistant] Let's think first: Annelids are worms such as the familiar earthworm. Annelids have bodies that are segmented. The familiar earthworm has a segmented body.... So the answer is [(B)]


[User]
What produces a diploid zygote?
Options:
- (A) salamanders
- (B) Plant reproduction
- (C) peachleaf willow
- (D) permineralization
- (E) sexual reproduction
- (F) Veins and arteries.
- (G) Chlorophyll
- (H) Most plants
--
Let's think first: Fertilization of gametes produces a diploid zygote. Sexual reproduction requires formation of gametes, followed by fertilization. Sexual reproduction produces a diploid zygote.... So the answer is [(E)]
What species of female mammal lacks a uterus and vagina?
Options:
- (A) fallopian tubes
- (B) echidna
- (C) live birth
- (D) lays eggs
- (E) cows
- (F) tortoises
- (G) alpacas
- (H) goats
--
Let's think first: Female monotremes lack a uterus and vagina. Examples of monotremes are the Platypus and Echidna. Platypus and echidna lack a uterus and vagina.... So the answer is [(B)]
What might have an envelope of proteins and enzymes?
Options:
- (A) fur seals
- (B) some viruses
- (C) Most plants
- (D) a fish
- (E) animal transport
- (F) animals
- (G) chickens
- (H) it needs them
--
Let's think first: Some viruses have an envelope of phospholipids and proteins. Phospholipases are the enzymes that degrade phospholipids . Some viruses have an envelope of enzymes and proteins.... So the answer is [(B)]
What happens when people flow into or out of a population?
Options:
- (A) genetic morphing
- (B) death
- (C) gene flow
- (D) movement
- (E) generic flow
- (F) interact
- (G) competition
- (H) gene expression
--
Let's think first: Gene flow occurs when individuals move into or out of a population. People are individuals, and each person has different needs. Gene flow occurs when people move into or out of a population.... So the answer is [(C)]
Sheep tend to favor the side of a mountain with more:
Options:
- (A) wool
- (B) precipitation
- (C) hydrate their cells
- (D) farmers
- (E) valleys
- (F) scattered light
- (G) food and shelter
- (H) They have thick fur
--
Let's think first: Precipitation falls on the windward side of the mountain range. Sheep tend to favour the windward side of a paddock. Sheep tend to favor the side of a mountain with more precipitation.... So the answer is [(B)]
The next generation of an organism rises via:
Options:
- (A) Plants growth
- (B) spontaneous generation
- (C) reproduction
- (D) The Sun
- (E) revolution
- (F) sun's heat
- (G) heat energy
- (H) unions
--

[Assistant] Let's think first: Reproduction is the process by which organisms give rise to offspring. Then, the lowest energy offspring are used as parents for the next generation. Reproduction is the process by which organisms give rise to the next generation.... So the answer is [(C)]


[User]
[[Ques]]: What does the substance that male dogs have in urine to mark their territory do?
Options:
- (A) sweating
- (B) attract females
- (C) Release energy
- (D) repels females
- (E) attract enemies
- (F) attract males
- (G) adding heat
- (H) dangerous
[[Ans]]: [Male dogs use pheromones in urine to mark their territory. Males produce 'pheromones' to attract females. Male dogs use something that attracts females in urine to mark their territory.]
[(B)]

[[Ques]]: How do proteins leave the er?
Options:
- (A) aqueous solution
- (B) it's state
- (C) Veins and arteries.
- (D) Move to another area
- (E) allow growth
- (F) active transport
- (G) It expands
- (H) movement
[[Ans]]: [Vesicle transport requires energy, so it is also a form of active transport. Proteins leave the ER in transport vesicles 5. Proteins leave the ER via active transport.]
[(F)]

[[Ques]]: What animal can regrow middle segments when broken?
Options:
- (A) amoeba
- (B) geckos
- (C) humans
- (D) insects
- (E) Wasps
- (F) worms
- (G) toads
- (H) snakes
[[Ans]]:

[Assistant]
[Annelids have the amazing capacity to regrow segments that break off. Annelids include earthworms and leeches. Earthworms have the ability to regrow segments that break off.]
[(F)]


[User]
What can help clients to heal?
Options:
- (A) high pitched tones
- (B) pressure on the body
- (C) Veins and arteries.
- (D) looseness of dirt or compost
- (E) reusing materials
- (F) recovery time from fatigue
- (G) smelling pungent smells
- (H) staring at bright objects
--
Let's think first: Touch is the ability to sense pressure. Therapeutic touch can activate the clients inherent healing ability. The ability to sense pressure on the body can help clients to heal.... So the answer is [(B)]
Hydrogen bonds cause what to expand when it freezes?
Options:
- (A) salt
- (B) mercury
- (C) NaCl
- (D) lake
- (E) H20
- (F) rain
- (G) h2o
- (H) oxygen
--
Let's think first: Hydrogen bonds cause water to expand when it freezes. Water is everywhere H20. Hydrogen bonds cause H20 to expand when it freezes.... So the answer is [(E)]
The total mass of organisms in an environmental stage is called what?
Options:
- (A) food pyramid
- (B) extinction
- (C) ecological pyramid
- (D) food chain
- (E) vegetation
- (F) food
- (G) ligt
- (H) biomass
--
Let's think first: Biomass is the total mass of organisms at a trophic level. Each stage is a trophic level. Biomass is the total mass of organisms in an environmental stage.... So the answer is [(H)]
Thyroxine increases the rate of metabolism in cells throughout the what?
Options:
- (A) Summer
- (B) body
- (C) state
- (D) skin
- (E) H 2 O
- (F) HIV
- (G) life
- (H) humans
--
Let's think first: Thyroid hormones increase the rate of metabolism in cells throughout the body. Thyroxine, a thyroid hormone, is an aryl iodide. Thyroxine increases the rate of metabolism in cells throughout the body.... So the answer is [(B)]
Arthropods have a life cycle with what?
Options:
- (A) rapid expansion
- (B) survival
- (C) aerobic capacity
- (D) food and shelter
- (E) an organism's body
- (F) reproduce
- (G) barnacles
- (H) mixing genes up
--
Let's think first: Arthropods have a life cycle with sexual reproduction. Sexual reproduction mixes the genes up more than is possible with asexual reproduction. Arthropods have a life cycle with mixing genes up.... So the answer is [(H)]
Pacinian corpuscles are found mainly in the _.
Options:
- (A) tumor
- (B) pupils
- (C) muscle
- (D) hair
- (E) skin
- (F) Man
- (G) retina
- (H) Summer
--

[Assistant] Let's think first: Pressure receptors are found mainly in the skin. Pacinian corpuscles are pressure receptors. Pacinian corpuscles are found mainly in the skin.... So the answer is [(E)]


[User]
Ribosomes are _.
Options:
- (A) Something to move
- (B) more abundant
- (C) interact
- (D) Most plants
- (E) hypertrophic
- (F) revolving
- (G) Energy.
- (H) fertile
--
Let's think first: Ribosomes are small organelles where proteins are made. All cell organelles are hypertrophic. Ribosomes are hypertrophic.... So the answer is [(E)]
What are single-celled organisms that lack a nucleus?
Options:
- (A) ferns
- (B) barnacles
- (C) Most plants
- (D) cacti
- (E) Leeuwenhoek
- (F) orchids
- (G) bacteria
- (H) PDAs
--
Let's think first: Prokaryotes are single-celled organisms that lack a nucleus. Bacteria are said to be prokaryotes . Bacteria are single-celled organisms that lack a nucleus.... So the answer is [(G)]
For animals, displays of color can be viewed as:
Options:
- (A) spectrum
- (B) prudishness
- (C) rainbow
- (D) courtship
- (E) positive
- (F) harm them
- (G) produce light
- (H) Movement
--
Let's think first: Courtship is behavior that is intended to attract a mate. Almost all animals display colors to attract a mate or to scare off a predator. Courtship can be manifested by displays of color.... So the answer is [(D)]
Alterations in genetic information may change a chromosome's structure or one
Options:
- (A) nitrogen
- (B) harm them
- (C) Plants growth
- (D) Damages them
- (E) spectrum
- (F) nuclear waste
- (G) nucelotide
- (H) nitrate
--
Let's think first: Mutations may change the structure of a chromosome or just change a single nucleotide. Mutations are changes in genetic information. Alterations in genetic information may change the structure of a chromosome or just a single nucleotide.... So the answer is [(G)]
What process reads and regulates gene expression?
Options:
- (A) organs
- (B) sensory neurons
- (C) A computer
- (D) Plants growth
- (E) translation
- (F) sweating
- (G) heat or cold
- (H) Most plants
--
Let's think first: Translation reads the genetic code in mRNA and makes a protein. Gene expression can be regulated at the level of translation of an mRNA into a protein. Translation reads and regulates gene expression.... So the answer is [(E)]
Most of what type of animal is known for having a shell?
Options:
- (A) fossils
- (B) toads
- (C) eggs
- (D) swea
- (E) small
- (F) insects
- (G) porous
- (H) snail
--

[Assistant] Let's think first: Most mollusks have shells. Among mollusks, the golden snail is a survivalist. Most snails have shells.... So the answer is [(H)]


[User]
Which is immobile?
Options:
- (A) adult starfish
- (B) all matter
- (C) adult goldfish
- (D) gastropod shells
- (E) tadpoles
- (F) adult sponges
- (G) an object
- (H) an organism's body
--
Let's think first: Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are immobile.... So the answer is [(F)]
Fertilization occurs when _ fuse.
Options:
- (A) fertile
- (B) sperm ducts
- (C) heat
- (D) eggs
- (E) seeds
- (F) gametes
- (G) pollen
- (H) ovaries
--
Let's think first: Fertilization occurs when a sperm and an egg fuse. Sperm and eggs are cells known as gametes. Fertilization occurs when gametes fuse.... So the answer is [(F)]
What is a process of removing wastes and excess water from the body?
Options:
- (A) hydration
- (B) urination
- (C) incontinence
- (D) trash can
- (E) vaporization
- (F) Cooking
- (G) body waste
- (H) Exfoliation
--
Let's think first: Excretion is the process of removing wastes and excess water from the body. Ketones are exhaled and excreted in urine. Urination is a process of removing wastes and excess water from the body.... So the answer is [(B)]
What do reptiles have?
Options:
- (A) wild rides
- (B) nerves
- (C) toadies
- (D) Bodily water
- (E) backbones
- (F) four limbs
- (G) Leptospirosis
- (H) pipe
--
Let's think first: Vertebrate chordates have a backbone. Because reptiles are vertebrates, they are chordates. Reptiles have backbones.... So the answer is [(E)]
What can help clients to heal?
Options:
- (A) high pitched tones
- (B) pressure on the body
- (C) Veins and arteries.
- (D) looseness of dirt or compost
- (E) reusing materials
- (F) recovery time from fatigue
- (G) smelling pungent smells
- (H) staring at bright objects
--
Let's think first: Touch is the ability to sense pressure. Therapeutic touch can activate the clients inherent healing ability. The ability to sense pressure on the body can help clients to heal.... So the answer is [(B)]
Where is the name of a habitat where a variety of ocean organisms often seek food and shelter?
Options:
- (A) gastropod shells
- (B) body water
- (C) seaweed
- (D) more abundant
- (E) whale
- (F) coastlines
- (G) algae
- (H) patch reefs
--

[Assistant] Let's think first: Coral reefs provide food and shelter to many ocean organisms. Coral reefs occur mainly as numerous patch reefs. Patch reef provide food and shelter to many ocean organisms.... So the answer is [(H)]


[User]
What do things that cannot make their own food need as a nutrient?
Options:
- (A) Energy
- (B) metal
- (C) animals
- (D) mud
- (E) Energy.
- (F) protein
- (G) prototype
- (H) fungi
--
Let's think first: Heterotrophs are living things that cannot make their own food. Proteins are an essential nutrient for heterotrophs . Living things that can't make their own food need protein.... So the answer is [(F)]
What causes h20 to expand when frozen?
Options:
- (A) evaporation
- (B) vaporization
- (C) hydrogen bonds
- (D) helium bonds
- (E) mysterious forces
- (F) nitrogen bonds
- (G) Physical weathering
- (H) precipitation
--
Let's think first: Hydrogen bonds cause water to expand when it freezes. Water is everywhere H20. Hydrogen bonds cause H20 to expand when it freezes.... So the answer is [(C)]
What is the process by which organisms give rise to their young?
Options:
- (A) Summer
- (B) cell division
- (C) autumn
- (D) Plants growth
- (E) peachleaf willow
- (F) ejaculation
- (G) reproduction
- (H) mating rituals
--
Let's think first: Reproduction is the process by which organisms give rise to offspring. Fetus is Latin for offspring or young one. Reproduction is the process by which organisms give rise to their young.... So the answer is [(G)]
Growth hormones are derived from phospholipds and:
Options:
- (A) Energy.
- (B) cholesterol
- (C) animals
- (D) layers of fat
- (E) fur and fat
- (F) Chemical energy
- (G) kinetic energy
- (H) Energy
--
Let's think first: Steroid hormones are made of lipids, such as phospholipids and cholesterol. Steroids are a kind of growth hormones. Growth hormones are derived from phospholipids and cholesterol.... So the answer is [(B)]
What will make human temperatures go in a different direction from what sweating would do?
Options:
- (A) humidity
- (B) shivering
- (C) improve
- (D) energy usage
- (E) a blazing fire
- (F) hot air
- (G) harm them
- (H) Damages them
--
Let's think first: Sweating reduces body heat. Shivering produces heat in the body. Sweating and shivering have different effects on our core temperatures.... So the answer is [(B)]
What live in large colonies and have complex social relationships.
Options:
- (A) Insects
- (B) potatoes
- (C) plants
- (D) parasites
- (E) honeybees
- (F) tortoises
- (G) bees
- (H) animals
--

[Assistant] Let's think first: Insects may live in large colonies and have complex social behaviors. Social behavior is organized by social relationships. Insects may live in large colonies and have complex social relationships.... So the answer is [(A)]


[User]
What use energy and minerals to make food?
Options:
- (A) trees
- (B) plant life
- (C) humans
- (D) producers
- (E) bears
- (F) elephants
- (G) Most plants
- (H) ferns
--
Let's think first: Producers use energy and inorganic molecules to make food. Minerals are inorganic substances. Producers use energy and minerals to make food.... So the answer is [(D)]
Amphibians have what sort of sensing system?
Options:
- (A) strong
- (B) retina
- (C) four limbs
- (D) chemical
- (E) mechanical
- (F) the eyes
- (G) nerves
- (H) heat or cold
--
Let's think first: Amphibians have sense organs to smell and taste chemicals. Smell and taste belong to our chemical sensing system. Amphibians have a chemical sensing system.... So the answer is [(D)]
Damaged dna might benefit from:
Options:
- (A) resistance
- (B) cellular repair
- (C) mutagens
- (D) UV rays
- (E) recovery
- (F) radiation
- (G) Electrical energy
- (H) flow of electrons
--
Let's think first: Cells have multiple repair mechanisms to fix mutations in DNA. And if the damaged DNA is duplicated, it causes mutation. Cells have multiple repair mechanisms to fix damaged DNA.... So the answer is [(B)]
The basic functioning unit of life all share the same what?
Options:
- (A) structure
- (B) four limbs
- (C) organ
- (D) Chlorophyll
- (E) Energy
- (F) layers of fat
- (G) health
- (H) Energy.
--
Let's think first: All cells share some of the same structures and basic functions. Cells are also the basic functioning unit of life. The basic functioning unit of life all share the same structures.... So the answer is [(A)]
What feeds on plankton and nonliving organic matter?
Options:
- (A) bacteria
- (B) barnacles
- (C) animals
- (D) sharks
- (E) pythons
- (F) graptolites
- (G) molluscs
- (H) bears
--
Let's think first: Bivalves feed on plankton and nonliving organic matter. Bivalve molluscs are very common. Molluscs feed on plankton and nonliving organic matter.... So the answer is [(G)]
What is the process of breaking down food into nutrients?
Options:
- (A) recycling
- (B) food processing
- (C) digestion
- (D) bacteria
- (E) eating
- (F) hydration
- (G) Dehydration
- (H) blender
--

[Assistant] Let's think first: Digestion is the process of breaking down food into components the body can absorb. Nutrients are absorbed by the intestines and if the walls are coated, fewer nutrients are absorbed. Digestion is the process of breaking down food into nutrients.... So the answer is [(C)]


[User]
What provides food and shelter to many ocean organisms?
Options:
- (A) houses
- (B) umbrellas
- (C) limestone
- (D) ferns
- (E) sharks
- (F) barnacles
- (G) calcite
- (H) sheds
--
Let's think first: Coral reefs provide food and shelter to many ocean organisms. Coral reefs are predominantly calcite. Calcite provides food and shelter to many ocean organisms.... So the answer is [(G)]
What has good eyesight?
Options:
- (A) humans
- (B) fur seals
- (C) athletes
- (D) bears
- (E) goats
- (F) geckos
- (G) elephants
- (H) rabbit
--
Let's think first: Most reptiles have good eyesight and a keen sense of smell. Geckos are, in fact, reptiles. Geckos have good eyesight.... So the answer is [(F)]
What happens when sperm swim from men's to women's reproductive organs?
Options:
- (A) by indirect light
- (B) matter vibrating
- (C) death
- (D) competition
- (E) fertile crescent
- (F) fertilizer
- (G) permineralization
- (H) fertilization
--
Let's think first: Sperm had to swim from male to female reproductive organs for fertilization. And the word for woman means a female of any age. Sperm have to swim from men to women reproductive organs to be fertilized.... So the answer is [(H)]
Where in a cell are ribosomes located?
Options:
- (A) outside the nucleus
- (B) Most plants
- (C) solid, liquid, gas
- (D) allow growth
- (E) Veins and arteries.
- (F) Earth orbiting the Sun
- (G) Chlorophyll
- (H) the body's largest organ
--
Let's think first: Ribosomes are structures in the cytoplasm where proteins are made. Outside the nucleus is cytoplasm. Ribosomes are structures outside the nucleus where proteins are made.... So the answer is [(A)]
What live mainly in shallow coastal waters?
Options:
- (A) Sea species
- (B) Coast guards
- (C) animals
- (D) Live Whales
- (E) Shallow people
- (F) fur seals
- (G) a fish
- (H) parasites
--
Let's think first: Marine species live mainly in shallow coastal waters. Marine Science Marine science is the study of the sea. Sea species live mainly in shallow coastal waters.... So the answer is [(A)]
What kind of species of animals mainly live in waters?
Options:
- (A) water plants
- (B) warm-blooded
- (C) colder and wetter
- (D) aquatic animals
- (E) aviary species of animals
- (F) objects that have mass
- (G) It helps them survive
- (H) kindom animalia
--

[Assistant] Let's think first: Marine species live mainly in shallow coastal waters. All species are aquatic, most are marine. Aquatic species live mainly in shallow coastal waters.... So the answer is [(D)]


[User]
Girls have used what to learn behaviors for generations?
Options:
- (A) Birds
- (B) trees
- (C) rainbows
- (D) sound
- (E) alleles
- (F) bows
- (G) nerves
- (H) dolls
--
Let's think first: Behaviors can be learned through play. Girls have played with dolls for generations. Girls have used dolls to learn behaviors for generations.... So the answer is [(H)]

What is an example of an entity that can live on in a completely inactive state?
Options:
- (A) an object
- (B) sloths
- (C) hibernating bears
- (D) Conifers
- (E) chickenpox
- (F) barnacles
- (G) a fish
- (H) mammals
--
Let's think first: Some viruses live in a dormant state inside the body. After an episode of chickenpox, the virus becomes dormant in the body. Chicken pox can live in an inactive state.... So the answer is [(E)]

How do male dogs mark their territory?
Options:
- (A) Chemical energy
- (B) Hot dog eating contest
- (C) Adequate signage
- (D) with their fur
- (E) Scent marker
- (F) heat produced
- (G) mate with females
- (H) Paint
--

[Assistant] Let's think first: Male dogs use pheromones in urine to mark their territory. During Urination Dog's urine is used as a scent marker for other dogs. Male dogs mark their territory with a scent marker.... So the answer is [(E)]


[User]
[Q] What are extremely important biomes?
Options:
- (A) important habitats
- (B) urban city
- (C) remains of prehistoric life
- (D) zoos
- (E) water conservation
- (F) Most plants
- (G) manmade aqueducts
- (H) marshes and swamps
[A] Here's my solution: Wetlands are extremely important biomes. Marshes and swamps are wetlands. Marshes and swamps are extremely important biomes. The answer is (H).

[Q] Biodiversity increases the what of islands?
Options:
- (A) water source
- (B) stability
- (C) Plants growth
- (D) our planet
- (E) luminescence
- (F) environment
- (G) human population
- (H) allow growth
[A] Here's my solution: Biodiversity increases the productivity and stability of ecosystems. Islands are delicately balanced ecosystems. Biodiversity increases the stability and productivity of islands. The answer is (B).

[Q] What stimulates the reproductive system to form male organs in growth?
Options:
- (A) Chemical energy
- (B) barnacles
- (C) Electrical energy
- (D) a doorbell
- (E) sensory neurons
- (F) peachleaf willow
- (G) Veins and arteries.
- (H) male hormones
[A] Here's my solution: Testosterone stimulates the reproductive organs to develop into male organs. Androgens are male hormones, like testosterone. Male hormones stimulated the reproductive organs to develop into male organs. The answer is (H).

[Q] Protein is made from:
Options:
- (A) Acids
- (B) DNA code
- (C) fur and fat
- (D) insects
- (E) animals
- (F) Energy.
- (G) Energy
- (H) food
[A]

[Assistant] Here's my solution: Chromosomes contain genes, which code for proteins. Information on DNA is organized into genes. DNA codes for proteins. The answer is (B).


[User]
What has a special excretory structure?
Options:
- (A) Silk plants.
- (B) Insects.
- (C) a fish
- (D) animals
- (E) plants
- (F) Architecture structures.
- (G) barnacles
- (H) Corset structure.
--
Let's think first: Some arthropods have special excretory structures. All insects are arthropods. Insects have special excretory structures.... So the answer is [(B)]
What is one attribute of most reptiles?
Options:
- (A) aerobic capacity
- (B) good olfaction
- (C) a cuticle
- (D) warm-blooded
- (E) graptolites
- (F) an organism's body
- (G) permineralization
- (H) stamina
--
Let's think first: Most reptiles have good eyesight and a keen sense of smell. Olfaction is the sense of smell and gustation is the sense of taste. Most reptiles have good olfaction.... So the answer is [(B)]
What can lead to alkalosis?
Options:
- (A) metabolic reaction
- (B) Breathing too fast or too slow
- (C) Drinking too much water.
- (D) Something that causes allergies
- (E) Sleeping too much.
- (F) direct damage to the lungs
- (G) Warm air moving into cold air
- (H) Eating too much.
--
Let's think first: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Alkalosis is a blood pH above 7.45. Rate of breathing being too fast or too slow can lead to alkalosis.... So the answer is [(B)]
What is a type of the basic units of the structure and function of living things?
Options:
- (A) sensory neurons
- (B) osteogenic
- (C) animals
- (D) Chemical energy
- (E) Energy
- (F) trees
- (G) ferns
- (H) fur and fat
--
Let's think first: Cells are the basic units of the structure and function of living things. Osteogenic cell types are indicated. Osteogenic is a type of the basic units of the structure and function of living things.... So the answer is [(B)]
What occurs over geologic time above the level of the species.
Options:
- (A) Warm air moving into cold air
- (B) wind and erosion
- (C) remains of prehistoric life
- (D) tectonic plates being pushed together
- (E) Something with a head, thorax, and abdomen
- (F) The area was once underwater
- (G) Species changing to another.
- (H) movement of tectonic plates
--
Let's think first: Macroevolution is evolution over geologic time above the level of the species. Macroevolution is said to be the change from one species to another. Change from one species to another is evolution over geologic time above the level of the species.... So the answer is [(G)]
What is a curse?
Options:
- (A) a form of aggression
- (B) Something coming from a gland
- (C) after too much water received
- (D) forest is destroyed
- (E) friendly behavior
- (F) a form of love
- (G) nonaggressive
- (H) death and devastation
--

[Assistant] Let's think first: Aggression is behavior that is intended to cause harm or pain. Curses are spells that are often intended to cause harm to another person. Curses are a form of aggression.... So the answer is [(A)]


[User]
(question). Organisms in a marine biome must be be adapted to what in the water?
Options:
- (A) mud
- (B) Nutrients
- (C) sodium
- (D) toxins
- (E) motion
- (F) sugar
- (G) energy
- (H) an anion
(answer). Organisms that live in marine biomes must be adapted to the salt in the water. Another name for salt is sodium. Organisms that live in marine biomes must be adapted to the sodium in the water.
The answer is (C)

(question). What increases the productivity and stability of ecosystems?
Options:
- (A) Fully cooking the oysters
- (B) genetic uniformity
- (C) genetic diversity
- (D) extinction
- (E) agriculture
- (F) disease
- (G) Earth orbiting the Sun
- (H) recycling
(answer). Biodiversity increases the productivity and stability of ecosystems. Biodiversity is basically genetic diversity. Genetic diversity increases the productivity and stability of ecosystems.
The answer is (C)

(question). Male dogs use_ in urine to mark their territory.
Options:
- (A) ammonia
- (B) Chemical energy
- (C) proteins
- (D) semiochemicals
- (E) animals
- (F) heat produced
- (G) nitric oxide
- (H) They have thick fur
(answer). Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use semiochemicals in urine to mark their territory.
The answer is (D)

(question). _ have the amazing capacity to regrow segments.
Options:
- (A) ferns
- (B) arachnids
- (C) roots
- (D) earthworms
- (E) anthropods
- (F) crustacean
- (G) loose soil
- (H) root growth
(answer).

[Assistant]
Annelids have the amazing capacity to regrow segments that break off. Earthworms Earthworms are in the phylum Annelids. Earthworms have the amazing capacity to regrow segments that break off.
The answer is (D)


[User]
What has a centralized nervous system with a brain?
Options:
- (A) Birds
- (B) pan
- (C) virus
- (D) sharks
- (E) Man
- (F) trout
- (G) leech
- (H) parasite
--
Let's think first: Fish have a centralized nervous system with a brain. Fish include trout and other fish. Trout have a centralized nervous system with a brain.... So the answer is [(F)]
What do humans eat?
Options:
- (A) Kelp
- (B) sugar
- (C) legumes
- (D) food
- (E) Eyes
- (F) Coral
- (G) animals
- (H) Squid
--
Let's think first: Mollusks are a major food source for other organisms, including humans. Interestingly, a squid is also a mollusk. Humans eat squid.... So the answer is [(H)]
Sperm swim to an egg inside a what?
Options:
- (A) gastropod shells
- (B) aqueous solution
- (C) archetype
- (D) archive
- (E) ocean water
- (F) pollen
- (G) archegonium
- (H) sperm
--
Let's think first: Fertilization occurs when sperm swim to an egg inside an archegonium. Pregnancy begins with a fertilized egg. Pregnancy begins after sperm swim to an egg inside an archegonium.... So the answer is [(G)]
Feathers help what kind of animals fly and provide insulation?
Options:
- (A) preventing heat transfer
- (B) dragons
- (C) passenger pigeons
- (D) butterflies
- (E) animals in the class Aves
- (F) airplanes
- (G) it protects them
- (H) retaining heat
--
Let's think first: Feathers help birds fly and provide insulation. Class Aves is for the birds, literally. Feathers help animals in the class Aves fly and give them insulation.... So the answer is [(E)]
What generally carries something bright red?
Options:
- (A) bears
- (B) veins
- (C) arteries
- (D) mammals
- (E) nerves
- (F) fur seals
- (G) Cars
- (H) bones
--
Let's think first: Arteries generally carry oxygen-rich blood. Oxygen-rich blood is bright red. Arteries generally carry something bright red.... So the answer is [(C)]
What do producers turn sunlight into?
Options:
- (A) energy
- (B) apples
- (C) heat
- (D) paper
- (E) drinks
- (F) waste
- (G) inorganic goods
- (H) food
--

[Assistant] Let's think first: Producers make food from inorganic molecules. Autotrophs absorb sunlight energy and transfer inorganic mineral nutrients into organic molecules. Producers make sunlight energy into food.... So the answer is [(H)]


[User]
What lacks respiratory and excretory systems?
Options:
- (A) the Sun
- (B) insects
- (C) starfish
- (D) barnacles
- (E) ferns
- (F) water
- (G) Conifers
- (H) humans
--
Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems.... So the answer is [(C)]
------
What animal can regrow middle segments when broken?
Options:
- (A) amoeba
- (B) geckos
- (C) humans
- (D) insects
- (E) Wasps
- (F) worms
- (G) toads
- (H) snakes
--
Let's think first: Annelids have the amazing capacity to regrow segments that break off. Annelids include earthworms and leeches. Earthworms have the ability to regrow segments that break off.... So the answer is [(F)]
------
What is it called when one solvent combines with another, what forms?
Options:
- (A) chemical pair
- (B) permineralization
- (C) chemical bonds
- (D) a solute
- (E) chemical duo
- (F) substance bonds
- (G) Condensation
- (H) kinetic energy
--
Let's think first: Chemical bonds form when substances react with one another. Solvents are substances, usually liquid, that dissolve other substances. When one solvent reacts with another, chemical bonds form.... So the answer is [(C)]
------
What happens to brain cells when the air supply is cut off?
Options:
- (A) strangulation
- (B) breathe
- (C) lead poisoning
- (D) death
- (E) hippocampus
- (F) painful
- (G) loss
- (H) die
--

[Assistant]
Let's think first: Brain cells die quickly if their oxygen supply is cut off. Air contains oxygen. Brain cells die quickly if their air supply is cut off.... So the answer is [(D)]
------


[User]
Use reasoning to answer the following question. How do squids reproduce?
Options:
- (A) while flying
- (B) seeds
- (C) split in two
- (D) electrically
- (E) sexually
- (F) asexually
- (G) movement
- (H) fertile

[Assistant]
Mollusks reproduce sexually. Interestingly, a squid is also a mollusk. Squids reproduce sexually.
So, the answer is (E).


[User]
question... Macroevolution most likely occurs over what period of time?
Options:
- (A) Summer
- (B) length
- (C) eons
- (D) long
- (E) growth
- (F) Earth
- (G) years
- (H) scale
answer... Macroevolution occurs over geologic time above the level of the species. All geologic time can be divided into two eons. Macroevolution occurs over eons.
The answer is (C)

question... What contains the green pigment chlorophyll?
Options:
- (A) seeds
- (B) orchids
- (C) barnacles
- (D) cacti
- (E) plastids
- (F) ferns
- (G) Most plants
- (H) bioaerosols
answer... Chloroplasts contain the green pigment chlorophyll. Chloroplasts are the most familiar plastids. Plastids contain the green pigment chlorophyll.
The answer is (E)

question... What gets organic compounds from dead organisms?
Options:
- (A) plants
- (B) elms
- (C) mud
- (D) molds
- (E) dead cats
- (F) cows
- (G) trees
- (H) sludge
answer...

[Assistant]
Most fungi get organic compounds from dead organisms. Molds are microscopic fungi. Molds get organic compounds from dead organisms.
The answer is (D)