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Question: A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade?
Options:
A. volcanic winter
B. volcanic summer
C. volcano fall
D. volcano spring | A |
Question: The existence of the plasma membrane was identified in the 1890s, and its chemical components were identified in 1915. the principal components identified at that time were these?
Options:
A. lipids and proteins
B. carbohydrates and proteins
C. gasses and proteins
D. lipids and carbohydrates | A |
Question: Acting like drawstrings to close off the alimentary canal, what regulates the passage of material between compartments?
Options:
A. hamstring
B. sphincter
C. intestine
D. uterus | B |
Question: What man-made substance tends to break down ozone in the stratosphere?
Options:
A. plastic
B. steel
C. cfcs
D. gasoline | C |
Question: What in saliva protects the lining of the mouth from abrasion and lubricates food for easier swallowing?
Options:
A. spores
B. hairs
C. phloem
D. mucus | D |
Question: Which latitudes get the most energy from the sun?
Options:
A. highest latitudes
B. middle latitudes
C. polular latitudes
D. lowest latitudes | D |
Question: Extended stays in zero gravity are not healthy for human beings. thus, for the comfort of the astronauts, the station is rotated so that the astronauts feel there is what?
Options:
A. revealed gravity
B. internal gravity
C. still gravity
D. Fixed Gravity | B |
Question: What parts of the planet does solar energy have difficulty reaching?
Options:
A. equators
B. deserts
C. poles
D. oceans | C |
Question: Oceans are made of a solution of what?
Options:
A. salt and carbon
B. salt and algae
C. salt and water
D. water and carbon | C |
Question: Although humans require it, what accounts for just one percent of all water on earth?
Options:
A. fresh water
B. snow
C. salt water
D. glaciers | A |
Question: Arachidic, stearic, and palmitic fatty acids are examples of what type of fatty acid?
Options:
A. neutral
B. integral
C. compacted
D. saturated | D |
Question: Weather maps show storms, air masses, and what?
Options:
A. currents
B. fronts
C. patterns
D. regions | B |
Question: What is a pure substance called?
Options:
A. homogeneous matter
B. a liquid
C. an element
D. a mixture | C |
Question: What term describes the energy of an object that is moving or has the potential to move?
Options:
A. mechanical energy
B. stationary energy
C. thermal energy
D. molecular energy | A |
Question: Evidence for the presence of what on mars makes scientists think that life might have existed there in the past?
Options:
A. air
B. gas
C. plasma
D. water | D |
Question: What does photosynthesis allow plants to generate?
Options:
A. clorophyll
B. enriched molecules
C. organic molecules
D. geometric molecules | C |
Question: How many low and high tides occur per day?
Options:
A. six
B. ten
C. two
D. four | C |
Question: What makes up most of the inside of a plant?
Options:
A. ground tissue
B. mitochondria
C. star tissue
D. animal tissue | A |
Question: The first living cells may have evolved around how long ago?
Options:
A. 4 billion years
B. 2.2 billion years
C. 900,000 years
D. 6 billion years | A |
Question: What kind of relay occurs between the uterus, hypothalamus, and the posterior pituitary to assure an adequate supply of the hormone oxytocin during childbirth?
Options:
A. currents feedback
B. positive feedback
C. affirmative feedback
D. pressure feedback | B |
Question: What type of plants do not typically require deep roots or woody stems?
Options:
A. surface plants
B. bacterial plants
C. dry plants
D. aquatic plants | D |
Question: What is the key to the demographic transition?
Options:
A. higher expatriation
B. higher birth rates
C. higher death rates
D. reduced family size | D |
Question: For the nervous system to function, neurons must be able to send and receive what?
Options:
A. proteins
B. information
C. pulses
D. signals | D |
Question: Molecules move from an area of high concentration to an area of lower concentration until an what is met?
Options:
A. freezing point
B. respiration
C. oxidation
D. equilibrium | D |
Question: What type of layers do animals' tissues develop from?
Options:
A. transgenic
B. dermic
C. cytoplasm
D. embryonic | D |
Question: Vectors along the same line can be what to one another like ordinary numbers?
Options:
A. noted
B. added
C. taken
D. lost | B |
Question: As a cell grows, its volume increases more quickly than its what?
Options:
A. age
B. density
C. weight
D. surface area | D |
Question: What is the term for an antibody that inappropriately marks self-components as foreign?
Options:
A. autoimmune antibody
B. autoantibody
C. compromised antibody
D. rogue antibody | B |
Question: What type of orbit do the planets make in the solar system?
Options:
A. figure eight
B. conical
C. elliptical
D. vertical | C |
Question: In which part of the ear are the vibrations amplified by the malleus, incus, and stapes?
Options:
A. inner ear
B. outer ear
C. middle ear
D. major ear | C |
Question: What landform occurs most often along plate boundaries?
Options:
A. dunes
B. sinkholes
C. volcanoes
D. geysers | C |
Question: Which type of glaciers form several unique features through erosion, including cirques, arêtes, and horns?
Options:
A. icebergs
B. valley glaciers
C. line glaciers
D. deep glaciers | B |
Question: What are the strongest chemical bonds?
Options:
A. curvature and ionic bonds
B. mutual and stock bonds
C. weak and ionic bonds
D. covalent and ionic bonds | D |
Question: Bacteria break down the remains of digested food through a processed called what?
Options:
A. synthesis
B. regulation
C. fermentation
D. oxidation | C |
Question: What is the term for the process in which water vapor changes to tiny droplets of liquid water?
Options:
A. condensation
B. vaporization
C. diffusion
D. dispersion | A |
Question: Specialized features of populations of galápagos finches inspired what theory?
Options:
A. evolution by isolation
B. evolution by force
C. evolution by reaction
D. evolution by natural selection | D |
Question: In the equation for pressure, how is force expressed?
Options:
A. teraflops
B. pounds
C. meters
D. newtons | D |
Question: The radiocarpal and midcarpal joints are responsible for all movements of the hand and what other part of the body?
Options:
A. fingers
B. wrist
C. shoulder
D. foot | B |
Question: Psip can be positive or negative relative to what kind of pressure?
Options:
A. manometric
B. inertia
C. atmospheric
D. magnetic | C |
Question: Lava erupts through long cracks in the ground, also called what?
Options:
A. faults
B. ridges
C. fissures
D. crevasses | C |
Question: What is the smallest aromatic hydrocarbon?
Options:
A. phosphate
B. furan
C. benzene
D. sulfide | C |
Question: Which type of tree loses its leaves each fall and remains leafless in the winter?
Options:
A. perennial
B. conifer
C. deciduous
D. annual | C |
Question: Water is a versatile solvent that can dissolve many ionic and polar molecular solutes to make what?
Options:
A. chloride solutions
B. aqueous solutions
C. sulfide solutions
D. sulfate solutions | B |
Question: Cigarettes are a major source of what kind of chemical substances linked with cancer?
Options:
A. pesticides
B. alkaloids
C. carcinogens
D. chemicals | C |
Question: Does the force of magnetism increase or decrease as the distance between objects increases?
Options:
A. decrease
B. fluctuate
C. remain stable
D. increase | A |
Question: What evolutionary concept emphasizes reproductive isolation?
Options:
A. reproductive method concept
B. chemical species concept
C. toxic species concept
D. biological species concept | D |
Question: What do you call the transfer of thermal energy between particles of matter that are touching?
Options:
A. oxidation
B. activation
C. conduction
D. convection | C |
Question: What's the term for a cyclic hydrocarbon with a carbon-carbon triple bond?
Options:
A. tricycloalkyne
B. bialkyne
C. bicycloalykne
D. cycloalkyne | D |
Question: Osmosis is driven by the imbalance of what?
Options:
A. evaporation
B. precipitation
C. water concentration
D. isolation | C |
Question: Chromosomes consist of what material made up of strings of dna?
Options:
A. gray matter
B. chromatin
C. rna
D. mitochondria | B |
Question: Are scissors simple or compound machines?
Options:
A. simple
B. lever
C. compound
D. neither | C |
Question: What type of isotopes have short half-lives and are given in very low doses?
Options:
A. stable isotopes
B. gasses
C. radionuclides
D. radioisotopes | D |
Question: What is the multi-phase process in which the nucleus of a eukaryotic cell divides?
Options:
A. cytokinesis
B. mitosis
C. fission
D. Osmosis | B |
Question: What are microscopic vessels with very thin, porous walls?
Options:
A. capillaries
B. valves
C. arteries
D. veins | A |
Question: Which part of a fish helps them breathe?
Options:
A. pores
B. gills
C. fins
D. layers | B |
Question: What produces hormones referred to as thymosins, which contribute to the development of the immune response in infants?
Options:
A. pancreas
B. thymus
C. receptors
D. heart | B |
Question: Some of the biggest waves occur with what type of storm that forms over the ocean and brings high winds?
Options:
A. tsunami
B. tropical storm
C. tropical depression
D. hurricane | D |
Question: In many species, display behaviors, like a gorilla beating on its chest, are used instead of actual physical attacks to show what?
Options:
A. stress
B. aggression
C. dominance
D. friction | B |
Question: What are the two types of vascular tissue?
Options:
A. cytoplasm and ectoplasm
B. phloem and phlegm
C. ectoderm and phloem
D. xylem and phloem | D |
Question: Because heterotrophs cannot make their own food, what are they called?
Options:
A. consumers
B. products
C. destroyers
D. customers | A |
Question: Nucleic acids contain the information needed for cells to make what?
Options:
A. protons
B. proteins
C. lipids
D. metabolytes | B |
Question: Unlike corals, jellyfish spend most of their lives as what?
Options:
A. medusae
B. pupae
C. infants
D. cercariae | A |
Question: What are materials that eject electrons when illuminated with light called?
Options:
A. fragmentation
B. photogenic
C. photoemissive
D. illumination | C |
Question: Hfcs are used as a replacement for what?
Options:
A. pollutants
B. nitrofluorocarbons
C. cfcs
D. gases | C |
Question: What has the burning of fossil fuels increased in the atmosphere?
Options:
A. temperature
B. carbon dioxide
C. ozone
D. oxygen | B |
Question: In humans, the sperm cell is the only cell with what structure that enables motility?
Options:
A. sporangia
B. False Cell
C. flagella
D. eukaryotic | C |
Question: Dispersal occurs only on what time scale?
Options:
A. conventional
B. evolutionary
C. regular
D. developmental | B |
Question: What type of feedback intensifies a change in the body’s physiological condition rather than reversing it?
Options:
A. neutral feedback
B. negative feedback
C. susceptible feedback
D. positive feedback | D |
Question: What law explains why some objects float and some sink.
Options:
A. flanges ' law
B. archimedes' law
C. montenegrins ' law
D. newton's law | B |
Question: What is the force of gravity called?
Options:
A. scale
B. pressure
C. weight
D. mass | C |
Question: The structure of the human tail bone is called what?
Options:
A. a vital structure
B. a abnormal structure
C. a vestigial structure
D. an artifact | C |
Question: Of course, a net external force is needed to cause any acceleration, just as newton proposed in his second law of what?
Options:
A. motion
B. speed
C. land
D. gravity | A |
Question: The oldest fossil of land plants date back how many millions of years?
Options:
A. 430 million years
B. 520 million years
C. 470 million years
D. 350 million years | C |
Question: What do young female meerkats act as in colonies?
Options:
A. babysitters
B. defenders
C. midwives
D. predators | A |
Question: Since europeans settled in the united states, about what percentage of topsoil has eroded away?
Options:
A. 33 percent
B. 42 percent
C. 10 percent
D. 25 percent | A |
Question: What is first year after birth is called?
Options:
A. infancy
B. neonatal stage
C. primary stage
D. adolescence | A |
Question: What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has?
Options:
A. element
B. molecule
C. atom
D. electrol | A |
Question: A protective coating of zinc to prevent corrosion is applied to steel and other metals labeled what?
Options:
A. galvanized
B. polarized
C. corroded
D. battered | A |
Question: How do bacteria reproduce?
Options:
A. sexual reproduction
B. nuclear fission
C. budding
D. binary fission | D |
Question: The pituitary gland is associated with what bodily system?
Options:
A. cardiovascular
B. nervous
C. endocrine
D. digestive | C |
Question: Why is it necessary to maintain proper levels of cations in intercellular fluids?
Options:
A. for digestion
B. cell division
C. keep cells healthy
D. reverse homeostasis | C |
Question: Evolving from a single common ancestor, what group of organisms was perhaps the dominant life form on earth 250 million years ago?
Options:
A. proteins
B. fungi
C. atoms
D. acids | B |
Question: What two forms can fluids take?
Options:
A. water or gas
B. vapor or gas
C. mixture or gas
D. liquid or gas | D |
Question: What are ionic compounds that produce hydroxide ions when dissolved in water?
Options:
A. enzymes
B. isotopes
C. acids
D. bases | D |
Question: When do end portions of two nonsister chromatids trade places?
Options:
A. during respiration
B. never
C. at every crossover
D. at night | C |
Question: Through which part of the body do most animals take in oxygen?
Options:
A. nose
B. ears
C. rectum
D. mouth | D |
Question: Magma can be created when temperature rises, pressure lowers, or what else is added?
Options:
A. water
B. dirt
C. air
D. sand | A |
Question: What is the rotational equivalent of a force?
Options:
A. centripetal force
B. torque
C. power
D. momentum | B |
Question: What happens when when the immune system does not work properly?
Options:
A. stroke
B. anemia
C. immunodeficiency
D. diabetes | C |
Question: What is the beneficial function to the body of sweating?
Options:
A. calorie loss
B. diuretic effect
C. regulating body temperature
D. pheromone release | C |
Question: What type of microscope is used to see extremely small objects?
Options:
A. ultrasonic microscope
B. optical microscope
C. electron microscope
D. X-ray microscope | C |
Question: What is the most prevalent gas in the atmosphere, but not the most vital for life?
Options:
A. carbon dioxide
B. nitrogen
C. argon
D. oxygen | B |
Question: Why wouldn't a teakettle have an aluminum handle?
Options:
A. it conducts heat
B. it is magnetic
C. it isn't washable
D. it absorbs light | A |
Question: What can help scientist gather information for an investigation?
Options:
A. observations
B. conclusions
C. controls
D. variables | A |
Question: What do we call the region on the lung root formed by the entrance of the nerves at the hilum?
Options:
A. pulmonary plexus
B. heart plexus
C. brain plexus
D. renal plexus | A |
Question: Both oxygen and glucose are transported within the body via what?
Options:
A. marrow
B. heart
C. blood
D. bone | C |
Question: An increase in the body's cholesterol levels can lead to your arteries filling with what?
Options:
A. plaque
B. marble
C. fat
D. triglycerides | A |
Question: After citric acid forms, it goes through a series of reactions that release what, which is then captured in special molecules?
Options:
A. energy
B. hydrogen
C. chlorophyll
D. metabolytes | A |
Question: All chemical changes involve a transfer of what?
Options:
A. energy
B. nitrogen
C. pressure
D. hydrogen | A |
Question: The normal response of the respiratory system to elevated ph is to increase the amount of what in the blood?
Options:
A. glucose
B. co2
C. acid
D. red blood cells | B |
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