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In the mammal family, what is the name for hoofed animals, such as deer, sheep, goats, pigs, buffalo, elephants and giraffes?
A. rodents
B. bovines
C. ungulates
D. primates
Answer: | C |
In the nematic phase, only the long axes of the molecules are parallel, and the ends are staggered at random intervals. in the smectic phase, the long axes of the molecules are parallel, and the molecules are also arranged in planes. finally, in thecholesteric phase, the molecules are arranged in layers; each layer is rotated with respect to the ones above and below it to give it this?
A. spiral structure
B. kinetic energy
C. symmetry
D. layer structure
Answer: | A |
What term means the force of attraction that holds together oppositely charged ions?
A. solvent bond
B. ionic bond
C. magnetic bond
D. electron bond
Answer: | B |
In single-celled organisms, plasma membrane extensions, such as whip-like flagella or brush-like cilia, aid in what?
A. sensation
B. movement
C. pressure
D. sound
Answer: | B |
What is defined as male gametes that form in the testes and mature in the epididymis?
A. sperm
B. stereocilia
C. mucus
D. plasma
Answer: | A |
All planets exhibit the same or nearly the same direction and shape of what path around the sun?
A. orbit
B. ellipse
C. nucleus
D. revolution
Answer: | A |
What do you call a change in the dna or rna sequence?
A. adaptation
B. degradation
C. infection
D. mutation
Answer: | D |
What is produced when hydrogen gas and oxygen gas are ignited?
A. liquid
B. air
C. water
D. Fire
Answer: | C |
What is the term for the buildup of electric charge on an object, which can be transferred to another when touched?
A. static cling
B. electric potential
C. electromagnetic electricity
D. static electricity
Answer: | D |
What is the basis of the classification of protists?
A. conditions shared
B. mutations shared
C. tails shared
D. traits shared
Answer: | D |
What is the movement of animals from one place to another called?
A. hibernation
B. extinction
C. migration
D. evacuation
Answer: | C |
What does the respiratory system exchange between the body and the outside air?
A. gases
B. nutrients
C. fluids
D. blood
Answer: | A |
In the body, second in volume to intracellular fluid is what type of fluid, which surrounds cells that are not blood cells?
A. circuitry fluid
B. watery fluid
C. concomitant fluid
D. interstitial fluid
Answer: | D |
How many sperm does it take to fertilize an egg?
A. 1
B. 4
C. 3
D. 2
Answer: | A |
The volume of a regularly shaped solid can be calculated from its what?
A. layers
B. mass
C. density
D. dimensions
Answer: | D |
What is approximately the average stroke volume in humans?
A. 65 ml
B. 75 ml
C. 70 ml
D. 80 ml
Answer: | C |
Systemic communication through the phloem helps integrate the functions of the whole what?
A. animal
B. bird
C. plant
D. insect
Answer: | C |
What structure shows the bonding between atoms, with dots representing available electrons?
A. Mendelian model
B. Pascal model
C. string theory
D. lewis structure
Answer: | D |
What is a thick, dark brown or black liquid found in rock layers of the earth's crust?
A. oil
B. coal
C. propane
D. fossil fuel
Answer: | A |
What are indestructible and constantly in motion?
A. viruses
B. ions
C. atoms
D. crystals
Answer: | C |
What kind of reaction do you see when the concentration of reactants is higher?
A. constant reaction rate
B. faster reaction rate
C. slow reaction rate
D. regular reaction rate
Answer: | B |
What part of a plant protects the plant cell, maintains its shape, and prevents excessive uptake of water?
A. wall
B. chloroplasm
C. stem
D. root
Answer: | A |
The process of splitting atoms creates what kind of waste?
A. radioactive
B. recyclable
C. safe
D. inert
Answer: | A |
Chromosomal alterations are mutations that change what?
A. detected structure
B. discovery structure
C. Skeleton Structure
D. chromosome structure
Answer: | D |
When an atom gains or loses an electron it becames an?
A. ion
B. neutron
C. photon
D. electron
Answer: | A |
What is a type of cell that supports neurons and maintains their environment?
A. neurofilament cell
B. interneuron cell
C. axon cell
D. glial cell
Answer: | D |
The coordinated activities of the legume and the rhizobium bacteria depend on what between the partners?
A. sight signals
B. fertilizer signals
C. electric signals
D. chemical signals
Answer: | D |
The purpose of scientific investigations generally is to test a what?
A. question
B. theory
C. hypothesis
D. suggestion
Answer: | C |
The most common curved mirrors are what?
A. solid
B. convex
C. concave
D. spherical
Answer: | D |
What type of tissue covers the outside of a plant in a single layer of cells called the epidermis?
A. anterior
B. dermal
C. mucous
D. dorsal
Answer: | B |
In a molecular compound, electrons are shared between atoms in which type of bond?
A. covalent
B. deformation
C. Ionic
D. corrosion
Answer: | A |
What process does water undergo to leave behind dissolved substances?
A. oxidation
B. accumulation
C. evaporation
D. ascension
Answer: | C |
What type of proteins bind to foreign substances and attempt destruction?
A. membranes
B. antibodies
C. ribosomes
D. antigens
Answer: | B |
Photosynthesis involves reactions that are dependent on what?
A. air
B. food
C. light
D. water
Answer: | C |
Like simple hormone pathways, hormone cascade pathways typically involve what kind of feedback?
A. positive
B. negative
C. effective
D. neutral
Answer: | B |
The ocean basin begins where the ocean meets what?
A. bay
B. land
C. sea
D. river
Answer: | B |
What causes cobalt chloride to turn pink?
A. show 2 + ions
B. h20 + ions
C. co 2+ ions
D. discussed 2 + ions
Answer: | C |
What bodily defense can be acquired in an active or passive way, and can be natural or artificial?
A. nerves
B. skin
C. immunity
D. membrane
Answer: | C |
Like the stem, what basic plant structure contains vascular bundles composed of xylem and phloem?
A. leaf
B. flower
C. bark
D. root
Answer: | A |
What kind of symmetry do echinoderm larvae have?
A. bilateral
B. spherical
C. internal
D. radial
Answer: | A |
Reducing waste, as well as reusing and recycling resources, can help save what?
A. coral resources
B. artificial resources
C. eletrical resources
D. natural resources
Answer: | D |
What is a person who studies the frequency and distribution of disease within human populations and environments called?
A. anthropologist
B. biologist
C. epidemiologist
D. entymologist
Answer: | C |
In adaptive radiation, what is the name of the initial species that then subsequently becomes multiple other ones?
A. pioneer
B. founder
C. Mother
D. father
Answer: | B |
The structures of both trifluoramine and hydroxylamine are similar to that of what?
A. magnesium
B. hydrogen
C. nitrogen
D. ammonia
Answer: | D |
What protects reptiles from drying out?
A. scales
B. skin
C. hairs
D. sweat
Answer: | A |
How many chromosomes do bacterial dna have?
A. one simple chromosome
B. one triangular chromosome
C. one circular chromosome
D. one rectangular chromosome
Answer: | C |
What makes blue cheese blue?
A. mites
B. rennit
C. fungus
D. rot
Answer: | C |
What type of evolution often happens in species that have symbiotic relationships?
A. coevolution
B. succession
C. retrogression
D. spontaneous evolution
Answer: | A |
Helicopter pilots can recover from piloting errors by decreasing altitude, turning some of their potential energy into what kind of energy?
A. active
B. free
C. electrical
D. kinetic
Answer: | D |
Rise divided by run is called what?
A. slope
B. steep
C. mound
D. hill
Answer: | A |
Where did west nile first appear?
A. North Africa
B. Southeast Asia
C. north america
D. Central America
Answer: | C |
How do cancer cells typically spread from one part of the body to another?
A. plasma
B. bloodstream
C. kidneys
D. liver
Answer: | B |
The rate of the accumulation of neutral what serves as a type of population-based biological clock?
A. polymorphisms
B. prokaryotic
C. enzymes
D. eukaryotes
Answer: | A |
The transmitted light strikes a photoelectric tube, which converts the light energy to?
A. electricity
B. gas
C. heat
D. color
Answer: | A |
About how many grams of carbohydrates are in a typical apple?
A. 30
B. 25
C. 20
D. 35
Answer: | C |
What is the smallest unit of a chemical element called?
A. droplet
B. cell
C. atom
D. nucleus
Answer: | C |
What is the term for a scalar measure of how quickly an object is moving along this line?
A. motion
B. force
C. velocity
D. speed
Answer: | D |
A redox reaction rearranges what subatomic particles?
A. neutrons
B. protons
C. water molecules
D. electrons
Answer: | D |
What substances digest the food in the vacuole of an ingestive protist?
A. enzymes
B. hormones
C. carbohydrates
D. lipids
Answer: | A |
What type of force allows non-polar molecules to interact?
A. centrifigal dispersion
B. london dispersion
C. graviitational force
D. experienced dispersion
Answer: | B |
What is a thin layer of bacteria that sticks to a surface?
A. a monofilm
B. a biolfilm
C. a choanocyte
D. a spicule
Answer: | B |
The amount of water vapor in the air and the temperature of the medium affects how fast what travels?
A. light
B. colour
C. sound
D. traffic
Answer: | C |
An rna codon reading guu encodes for what?
A. arginine
B. glycine
C. valine
D. carbon
Answer: | C |
Scanning acoustic microscopes use what kind of waves to scan a specimen?
A. sound waves
B. radio waves
C. heat waves
D. gamma waves
Answer: | A |
The contents of which organ are mixed every 20 seconds?
A. kidney
B. the metabolism
C. pancreas
D. the stomach
Answer: | D |
How many chambers are in a reptiles heart?
A. ten
B. two
C. three
D. five
Answer: | C |
What is the opening in the front of the eye called?
A. lens
B. cornea
C. iris
D. pupil
Answer: | D |
When salinity and pressure increase, or when temperature decreases, what happens to water density?
A. fluctuates
B. increases
C. drops
D. stays the same
Answer: | B |
The bending of a wave around the edges of an opening or an obstacle is called this?
A. sputtering
B. diffraction
C. absorption
D. reflection
Answer: | B |
What controls the shape of a developing zygote early in its development?
A. chromosomes
B. storage genes
C. gap genes
D. DNA
Answer: | C |
What happens to structural genes in the presence of tryptophan?
A. they are transcribed
B. they are not transcribed
C. they are exterminated
D. they are not oxidised
Answer: | B |
What type of pressure may build up inside the cell when water moves into a cell by osmosis?
A. impervious pressure
B. osmotic pressure
C. transverse pressure
D. pleasurable pressure
Answer: | B |
What is the process by which plants make their own food called?
A. fusion
B. photosynthesis
C. atherosclerosis
D. fission
Answer: | B |
Conductivity, oxidation state and physical appearance are properties that help determine whether what are metals?
A. elements
B. atoms
C. phases
D. organisms
Answer: | A |
What specific part of the brain regulates the endocrine system?
A. frontal lobe
B. parietal lobe
C. hippocampus
D. hypothalamus
Answer: | D |
Chemical reactions follow which laws?
A. thermodynamics
B. Archie's law
C. Physics Analysis
D. Chemical kinetics
Answer: | A |
There are three basic types of hormones: lipid-derived, amino acid-derived, and what?
A. manipulated
B. secreted
C. acidic
D. peptide
Answer: | D |
Fertilization occurs when an egg and sperm come together to form a what?
A. cell
B. infant
C. zygote
D. eukaryote
Answer: | C |
The explosion of nitroglycerin, which releases large volumes of gases, is what type of reaction?
A. exponential
B. exothermic
C. energetic
D. endothermic
Answer: | B |
What done ozone help protect against?
A. helium rays
B. x-rays
C. ultraviolet rays
D. gamma rays
Answer: | C |
What category of food includes sugars, starches and fibers?
A. alcohols
B. carbohydrates
C. proteins
D. enzymes
Answer: | B |
What are substances that the body needs for energy, building materials, and control of body processes?
A. molecules
B. nutrients
C. carbons
D. acids
Answer: | B |
What law shows the relationships among temperature, volume, and pressure?
A. Newton's law
B. combined gas
C. Law of Conservation
D. Murphy's Law
Answer: | B |
What 2 things keep polar bears warm in their arctic ecosystem?
A. thick fur, blubber
B. camouflage, blubber
C. colourful fur , blubber
D. hibernation, thick fur
Answer: | A |
What two things are a phospholipid molecules composed of?
A. hydrophillic head , and substrate tails
B. hemophillic head, and substrate tails
C. hydrophillic head , and hydrophobic tails
D. hydrophillic head , and adhesion tails
Answer: | C |
When plants reproduce, the offspring has characteristics similar to the?
A. parents
B. siblings
C. grandparents
D. cousins
Answer: | A |
Algae are like plants mainly because they contain what?
A. cell wall
B. chloroplasts
C. cells
D. organelles
Answer: | B |
The radius of an atom is defined as one-half the distance between the nuclei in a molecule consisting of two identical atoms joined by what?
A. metallic bond
B. ionic bond
C. covalent bond
D. hydrogen bond
Answer: | C |
What is it called when a mistake occurs in dna replication.
A. radiation
B. degradation
C. mutation
D. adaptation
Answer: | C |
Birds are thought to have evolved around 150 million years ago from what?
A. theropod dinosaurs
B. raptor dinosaurs
C. parrot dinosaurs
D. teradactils
Answer: | A |
The mostly subterranean lifestyle of stone plants reduces water loss from evaporation and inhibits what?
A. photosynthesis
B. chlorophyll
C. tissues
D. reactions
Answer: | A |
What is the term for the process in which an area that has never before been colonized changes through time?
A. ecological succession
B. environmental succession
C. continuous succession
D. colony succession
Answer: | A |
All the major landmasses moved together to form one supercontinent in which period?
A. Mesozoic
B. Cenozoic
C. cambrian
D. permian
Answer: | D |
A problem with using food chains to describe ecosystems is that some organisms can feed on or be consumed by species from more than one of what level?
A. trophic level
B. biome level
C. pH level
D. habitat level
Answer: | A |
What is the practical application of scientific principles and discoveries to develop things that make our lives easier?
A. Movement
B. experiment
C. engineering
D. component
Answer: | C |
In plants, a cell plate is formed during cell cytokinesis by golgi vesicles fusing at the what?
A. tectonic plate
B. metaphase plate
C. mitosis plate
D. chromosomes plate
Answer: | B |
What is the type of volcano with a tall cone shape that you picture when picturing a volcano?
A. composite
B. active
C. advanced
D. inactive
Answer: | A |
The amount of what entering the eyes helps control the biological clock?
A. heat
B. energy
C. light
D. air
Answer: | C |
Protists are classified as animal-like, plant-like, or what else?
A. fungus-like
B. bacteria - like
C. virus - like
D. pathogen - like
Answer: | A |
Satellite and schwann cells are the two types of what kind of cell found in the pns?
A. dendritic
B. osteoclast
C. glial
D. epidermal
Answer: | C |
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