 1,000,000
 500,000
 250,000
 125,000

64,000

32,000

16,000

8,000

4,000

2,000

1,000

500

300

200

100
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answers, then Cont-A to
switch back to pointer.
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class
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Which human activity will have the MOST positive effect on the
global environment?
A. reducing air pollution across
countries by enforcing stricter
emissions laws
C. planting trees in neighborhoods
where recent construction has
taken place.
B. decreasing the amount of trash
in landfills through recycling
of glass bottles.
D. establishing a wildlife reserve for
the protection of local
endangered species.
A. reducing air pollution across
countries by enforcing stricter
emissions laws
Back to
Board
A summer camp was built near a lake in the mountains. The campers
used the lake for swimming, fishing, and boating. The relationships
between the three organisms found in the lake are shown above. Which
of these fish cell structures would be most directly affected by a change
in the oxygen level of the lake?
A. nucleus
B. Endoplasmic reticulum
C. mitochondrion
D. Golgi apparatus
C. mitochondrion
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Board
A scientist proposes that there is a gene that both predisposes
people to smoke and contributes to heart disease. She claims that
the association between smoking and heart disease is explained by
the presence of this gene, and she disputes the conclusion of the
Framingham Study that smoking by itself increases the risk of heart
disease.
Which of the following types of scientific investigation would provide
the best evidence against this scientist’s genetic explanation of the
link between smoking and heart disease?
A. Interviews with smokers indicating that
cardiac symptoms are most acute when
they have been smoking heavily
B. Controlled experiments showing that
lab rats exposed to cigarette smoke
are more likely to develop heart disease
C. Observational studies showing that heart
disease risk increases only after
an individual has begun smoking
D. Gene-sequencing studies indicating
that there is a gene related to heart
disease that is carried by some nonsmokers
B. Controlled experiments showing
that lab rats exposed to cigarette
smoke are more likely to develop heart
disease
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Board
The diagram above shows the feeding relationships for four coral reef organisms. Humans
sometimes kill giant tritons in order to collect their attractive spiral shells. If humans kill
most of the giant tritons in a coral reef, the coral population most likely will
A. decrease due to a decrease in the
crown-of-thorns sea star population
C. increase due to an increase
in the parrot fish population
B. decreases due to a decrease
in the parrot fish population
D. increase due to a decrease in the
crown-of-thorns sea star population
A. decrease due to a decrease in
the crown-of-thorns sea star
population
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Board
Earlobes may be free or attached, as shown in the illustration above. The
type of earlobe a person has is genetically determined. The allele for free
earlobe (E) is dominant, while the allele for attached earlobes (e) is
recessive. A pedigree for the earlobe trait is shown above. Which of the
following encodes the genetic information for the earlobe trait?
A. ATP
B. hormones
C. carbohydrates
D. DNA
D. DNA
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Board
A pictorial chart of five cichlid species of fish is
shown above. The physical differences among the
fish are most likely
A. A swimming adaptation
due to water temperature
C. a feeding adaptation
due to competition for food
B. An osmotic adaptation
due to salinity levels
D. A respiration adaptation
due to different oxygen levels
C. a feeding adaptation due to
competition for food
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Board
Which statement BEST describes the primary
function of DNA replication?
A. To prevent mutations from
occuring in cells
C. To allow prokaryotic cells to
undergo meiosis
B. to ensure daughter cells
have a complete copy of the DNA.
D. To provide genetic variation
within specific organisms
B. to ensure daughter cells
have a complete copy of
the DNA
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Board
Which cellular process converts solar energy into
chemical energy?
A. respiration
B. transpiration
C. photosynthesis
D. chemosynthesis
C. photosynthesis
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Board
The graph above shows the production of antibodies following a flu shot.
Which of the following statements best describes the maximum antibody
level of a person’s body after a flu shot?
A. It occurs immediately
B. it is never achieved
C. It is achieved on day 15
D. It is achieved on day 18
D. It is achieved on day 18
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Board
The diagram shows a relationship between photosynthesis and cellular
respiration. Which statement best describes the interdependence of
photosynthesis and cellular respiration?
A. The products of photosynthesis
are carbon dioxide and water to
be used in cellular respiration
B. The reactants of photosynthesis
are the products of
cellular respiration.
C. The reactants of photosynthesis
are sugar and oxygen
to be used in cellular respiration.
D. The products of photosynthesis
are the same as the products
of cellular respiration
B. The reactants of photosynthesis
are the products of
cellular respiration.
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Board
The chemical equation above shows the reaction
of glucose and oxygen.
Which process does this equation represent?
A. Aerobic respiration
C. Anaerobic respiration
B. photosynthesis
D. Nitrogen fixation
A. Aerobic respiration
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Board
The three factors that contribute to
arterial blood pressure are cardiac
output, blood volume and _____.
A. viscosity
C. valves
B. resistance
D. Heart rate
B. resistance
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Board
This data of a forest plot supports the idea
A. red oaks grow more
quickly than hemlocks
B. hemlock trees regenerate
quickly after a fire
C. pitch pines are resistant
to fire
D. birch trees have the
most stored energy
C. pitch pines are resistant
to fire
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Board
The scientific theory of evolution by natural selection is well
supported through much evidence, would this theory ever
become a law?
A. Theories cannot become
laws because theories are
explanations of a series of
observations
B. This theory will eventually
become a law after many repeated
observations yield the same result.
C. This theory will become law
because theories and laws are
essentially the same thing
D. Theories don't become laws
because laws are well-supported
explanations/descriptions of a
situation, and a theory explains a
series of observations.
D. Theories don't become laws
because laws are well-supported
explanations/descriptions of a
situation, and a theory explains a
series of observations.
Back to
Board
A disease resulting in the deaths of one-third of a dense population
of bats in a cave would be a
A. density-dependent
limiting factor
C. Result of the demographic
transition
B. density-independent
limiting factor
D. Result of social and
economic factors
A.density-dependent
limiting factor
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