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Although humans require it, what accounts for just one percent of all water on earth?
A. fresh water
B. salt water
C. glaciers
D. snow
Answer: | A |
Arachidic, stearic, and palmitic fatty acids are examples of what type of fatty acid?
A. neutral
B. saturated
C. compacted
D. integral
Answer: | B |
Weather maps show storms, air masses, and what?
A. patterns
B. fronts
C. currents
D. regions
Answer: | B |
What is a pure substance called?
A. homogeneous matter
B. an element
C. a liquid
D. a mixture
Answer: | B |
What term describes the energy of an object that is moving or has the potential to move?
A. thermal energy
B. mechanical energy
C. molecular energy
D. stationary energy
Answer: | B |
Evidence for the presence of what on mars makes scientists think that life might have existed there in the past?
A. water
B. air
C. gas
D. plasma
Answer: | A |
What does photosynthesis allow plants to generate?
A. organic molecules
B. enriched molecules
C. clorophyll
D. geometric molecules
Answer: | A |
How many low and high tides occur per day?
A. ten
B. four
C. six
D. two
Answer: | D |
What makes up most of the inside of a plant?
A. animal tissue
B. star tissue
C. ground tissue
D. mitochondria
Answer: | C |
The first living cells may have evolved around how long ago?
A. 900,000 years
B. 4 billion years
C. 2.2 billion years
D. 6 billion years
Answer: | B |
What kind of relay occurs between the uterus, hypothalamus, and the posterior pituitary to assure an adequate supply of the hormone oxytocin during childbirth?
A. currents feedback
B. pressure feedback
C. positive feedback
D. affirmative feedback
Answer: | C |
What type of plants do not typically require deep roots or woody stems?
A. bacterial plants
B. surface plants
C. aquatic plants
D. dry plants
Answer: | C |
What is the key to the demographic transition?
A. higher birth rates
B. higher expatriation
C. reduced family size
D. higher death rates
Answer: | C |
For the nervous system to function, neurons must be able to send and receive what?
A. proteins
B. signals
C. information
D. pulses
Answer: | B |
Molecules move from an area of high concentration to an area of lower concentration until an what is met?
A. oxidation
B. respiration
C. freezing point
D. equilibrium
Answer: | D |
What type of layers do animals' tissues develop from?
A. embryonic
B. transgenic
C. cytoplasm
D. dermic
Answer: | A |
Vectors along the same line can be what to one another like ordinary numbers?
A. added
B. noted
C. taken
D. lost
Answer: | A |
As a cell grows, its volume increases more quickly than its what?
A. density
B. age
C. weight
D. surface area
Answer: | D |
What is the term for an antibody that inappropriately marks self-components as foreign?
A. autoantibody
B. compromised antibody
C. autoimmune antibody
D. rogue antibody
Answer: | A |
What type of orbit do the planets make in the solar system?
A. vertical
B. elliptical
C. figure eight
D. conical
Answer: | B |
In which part of the ear are the vibrations amplified by the malleus, incus, and stapes?
A. major ear
B. middle ear
C. inner ear
D. outer ear
Answer: | B |
What landform occurs most often along plate boundaries?
A. dunes
B. geysers
C. volcanoes
D. sinkholes
Answer: | C |
Which type of glaciers form several unique features through erosion, including cirques, arêtes, and horns?
A. deep glaciers
B. icebergs
C. valley glaciers
D. line glaciers
Answer: | C |
What are the strongest chemical bonds?
A. covalent and ionic bonds
B. curvature and ionic bonds
C. mutual and stock bonds
D. weak and ionic bonds
Answer: | A |
Bacteria break down the remains of digested food through a processed called what?
A. synthesis
B. fermentation
C. regulation
D. oxidation
Answer: | B |
What is the term for the process in which water vapor changes to tiny droplets of liquid water?
A. vaporization
B. condensation
C. diffusion
D. dispersion
Answer: | B |
Specialized features of populations of galápagos finches inspired what theory?
A. evolution by reaction
B. evolution by natural selection
C. evolution by force
D. evolution by isolation
Answer: | B |
In the equation for pressure, how is force expressed?
A. teraflops
B. pounds
C. meters
D. newtons
Answer: | D |
The radiocarpal and midcarpal joints are responsible for all movements of the hand and what other part of the body?
A. wrist
B. foot
C. shoulder
D. fingers
Answer: | A |
Psip can be positive or negative relative to what kind of pressure?
A. atmospheric
B. manometric
C. magnetic
D. inertia
Answer: | A |
Lava erupts through long cracks in the ground, also called what?
A. crevasses
B. faults
C. fissures
D. ridges
Answer: | C |
What is the smallest aromatic hydrocarbon?
A. benzene
B. sulfide
C. phosphate
D. furan
Answer: | A |
Which type of tree loses its leaves each fall and remains leafless in the winter?
A. conifer
B. annual
C. deciduous
D. perennial
Answer: | C |
Water is a versatile solvent that can dissolve many ionic and polar molecular solutes to make what?
A. sulfide solutions
B. sulfate solutions
C. chloride solutions
D. aqueous solutions
Answer: | D |
Cigarettes are a major source of what kind of chemical substances linked with cancer?
A. pesticides
B. alkaloids
C. carcinogens
D. chemicals
Answer: | C |
Does the force of magnetism increase or decrease as the distance between objects increases?
A. increase
B. remain stable
C. decrease
D. fluctuate
Answer: | C |
What evolutionary concept emphasizes reproductive isolation?
A. biological species concept
B. toxic species concept
C. chemical species concept
D. reproductive method concept
Answer: | A |
What do you call the transfer of thermal energy between particles of matter that are touching?
A. activation
B. convection
C. conduction
D. oxidation
Answer: | C |
What's the term for a cyclic hydrocarbon with a carbon-carbon triple bond?
A. bicycloalykne
B. cycloalkyne
C. tricycloalkyne
D. bialkyne
Answer: | B |
Osmosis is driven by the imbalance of what?
A. evaporation
B. isolation
C. water concentration
D. precipitation
Answer: | C |
Chromosomes consist of what material made up of strings of dna?
A. chromatin
B. gray matter
C. mitochondria
D. rna
Answer: | A |
Are scissors simple or compound machines?
A. lever
B. compound
C. simple
D. neither
Answer: | B |
What type of isotopes have short half-lives and are given in very low doses?
A. radionuclides
B. gasses
C. stable isotopes
D. radioisotopes
Answer: | D |
What is the multi-phase process in which the nucleus of a eukaryotic cell divides?
A. cytokinesis
B. fission
C. Osmosis
D. mitosis
Answer: | D |
What are microscopic vessels with very thin, porous walls?
A. veins
B. arteries
C. valves
D. capillaries
Answer: | D |
Which part of a fish helps them breathe?
A. layers
B. fins
C. gills
D. pores
Answer: | C |
What produces hormones referred to as thymosins, which contribute to the development of the immune response in infants?
A. heart
B. receptors
C. thymus
D. pancreas
Answer: | C |
Some of the biggest waves occur with what type of storm that forms over the ocean and brings high winds?
A. tsunami
B. tropical depression
C. hurricane
D. tropical storm
Answer: | C |
In many species, display behaviors, like a gorilla beating on its chest, are used instead of actual physical attacks to show what?
A. stress
B. friction
C. dominance
D. aggression
Answer: | D |
What are the two types of vascular tissue?
A. ectoderm and phloem
B. xylem and phloem
C. phloem and phlegm
D. cytoplasm and ectoplasm
Answer: | B |
Because heterotrophs cannot make their own food, what are they called?
A. destroyers
B. consumers
C. customers
D. products
Answer: | B |
Nucleic acids contain the information needed for cells to make what?
A. lipids
B. protons
C. proteins
D. metabolytes
Answer: | C |
Unlike corals, jellyfish spend most of their lives as what?
A. pupae
B. cercariae
C. medusae
D. infants
Answer: | C |
What are materials that eject electrons when illuminated with light called?
A. photoemissive
B. photogenic
C. fragmentation
D. illumination
Answer: | A |
Hfcs are used as a replacement for what?
A. cfcs
B. nitrofluorocarbons
C. gases
D. pollutants
Answer: | A |
What has the burning of fossil fuels increased in the atmosphere?
A. ozone
B. temperature
C. oxygen
D. carbon dioxide
Answer: | D |
In humans, the sperm cell is the only cell with what structure that enables motility?
A. False Cell
B. sporangia
C. flagella
D. eukaryotic
Answer: | C |
Dispersal occurs only on what time scale?
A. conventional
B. regular
C. developmental
D. evolutionary
Answer: | D |
What type of feedback intensifies a change in the body’s physiological condition rather than reversing it?
A. positive feedback
B. neutral feedback
C. susceptible feedback
D. negative feedback
Answer: | A |
What law explains why some objects float and some sink.
A. flanges ' law
B. newton's law
C. archimedes' law
D. montenegrins ' law
Answer: | C |
What is the force of gravity called?
A. scale
B. weight
C. pressure
D. mass
Answer: | B |
The structure of the human tail bone is called what?
A. a vital structure
B. an artifact
C. a abnormal structure
D. a vestigial structure
Answer: | D |
Of course, a net external force is needed to cause any acceleration, just as newton proposed in his second law of what?
A. land
B. speed
C. motion
D. gravity
Answer: | C |
The oldest fossil of land plants date back how many millions of years?
A. 470 million years
B. 430 million years
C. 520 million years
D. 350 million years
Answer: | A |
What do young female meerkats act as in colonies?
A. babysitters
B. predators
C. midwives
D. defenders
Answer: | A |
Since europeans settled in the united states, about what percentage of topsoil has eroded away?
A. 42 percent
B. 10 percent
C. 25 percent
D. 33 percent
Answer: | D |
What is first year after birth is called?
A. neonatal stage
B. primary stage
C. adolescence
D. infancy
Answer: | D |
What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has?
A. molecule
B. atom
C. element
D. electrol
Answer: | C |
A protective coating of zinc to prevent corrosion is applied to steel and other metals labeled what?
A. battered
B. polarized
C. galvanized
D. corroded
Answer: | C |
How do bacteria reproduce?
A. nuclear fission
B. sexual reproduction
C. budding
D. binary fission
Answer: | D |
The pituitary gland is associated with what bodily system?
A. endocrine
B. nervous
C. digestive
D. cardiovascular
Answer: | A |
Why is it necessary to maintain proper levels of cations in intercellular fluids?
A. cell division
B. keep cells healthy
C. for digestion
D. reverse homeostasis
Answer: | B |
Evolving from a single common ancestor, what group of organisms was perhaps the dominant life form on earth 250 million years ago?
A. proteins
B. atoms
C. acids
D. fungi
Answer: | D |
What two forms can fluids take?
A. liquid or gas
B. vapor or gas
C. water or gas
D. mixture or gas
Answer: | A |
What are ionic compounds that produce hydroxide ions when dissolved in water?
A. isotopes
B. acids
C. bases
D. enzymes
Answer: | C |
When do end portions of two nonsister chromatids trade places?
A. at every crossover
B. at night
C. during respiration
D. never
Answer: | A |
Through which part of the body do most animals take in oxygen?
A. nose
B. mouth
C. ears
D. rectum
Answer: | B |
Magma can be created when temperature rises, pressure lowers, or what else is added?
A. water
B. dirt
C. air
D. sand
Answer: | A |
What is the rotational equivalent of a force?
A. momentum
B. torque
C. centripetal force
D. power
Answer: | B |
What happens when when the immune system does not work properly?
A. anemia
B. diabetes
C. stroke
D. immunodeficiency
Answer: | D |
What is the beneficial function to the body of sweating?
A. calorie loss
B. diuretic effect
C. pheromone release
D. regulating body temperature
Answer: | D |
What type of microscope is used to see extremely small objects?
A. X-ray microscope
B. electron microscope
C. ultrasonic microscope
D. optical microscope
Answer: | B |
What is the most prevalent gas in the atmosphere, but not the most vital for life?
A. carbon dioxide
B. oxygen
C. nitrogen
D. argon
Answer: | C |
Why wouldn't a teakettle have an aluminum handle?
A. it isn't washable
B. it is magnetic
C. it absorbs light
D. it conducts heat
Answer: | D |
What can help scientist gather information for an investigation?
A. controls
B. observations
C. conclusions
D. variables
Answer: | B |
What do we call the region on the lung root formed by the entrance of the nerves at the hilum?
A. renal plexus
B. pulmonary plexus
C. heart plexus
D. brain plexus
Answer: | B |
Both oxygen and glucose are transported within the body via what?
A. bone
B. blood
C. marrow
D. heart
Answer: | B |
An increase in the body's cholesterol levels can lead to your arteries filling with what?
A. fat
B. triglycerides
C. marble
D. plaque
Answer: | D |
After citric acid forms, it goes through a series of reactions that release what, which is then captured in special molecules?
A. energy
B. hydrogen
C. metabolytes
D. chlorophyll
Answer: | A |
All chemical changes involve a transfer of what?
A. hydrogen
B. nitrogen
C. energy
D. pressure
Answer: | C |
The normal response of the respiratory system to elevated ph is to increase the amount of what in the blood?
A. glucose
B. red blood cells
C. acid
D. co2
Answer: | D |
What part of an atom is electrically neutral?
A. neutrons
B. electrons
C. newtons
D. protons
Answer: | A |
Bar, circle, and line are all types of what?
A. theories
B. algorithms
C. graphs
D. maps
Answer: | C |
Unlike eukaryotic cells, dna and rna synthesis in prokaryotic cells occurs together with synthesis of what?
A. protein
B. mutation
C. membrane
D. fruit
Answer: | A |
What type of bacteria are sometimes used as weapons of bioterrorism?
A. avian
B. hypothermic
C. carcinogenic
D. pathogenic
Answer: | D |
What is the name of a joint in which one bone rotates in relation to another bone?
A. pivot joint
B. ball and socket
C. gliding
D. hinge
Answer: | A |
Cirrus, stratus, and cumulus are types of what?
A. storms
B. slopes
C. clouds
D. plants
Answer: | C |
What is a buildup of electric charges on objects?
A. wattage
B. potential
C. conduction
D. static
Answer: | D |
Where do you find the greatest biodiversity?
A. in the tropics
B. in shallow lakes
C. in the tundra
D. at the poles
Answer: | A |
The ostwald process is the commercial method for producing what?
A. citric acid
B. deoxyribonucleic acid
C. nitric acid
D. chlorine
Answer: | C |
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