Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Natural selection could not occur without a. | genetic
variation in species. | c. | competition for
unlimited resources. | b. | environmental changes. | d. | gradual warming of Earth. | | | | |
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2.
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Natural selection causes a. | changes in the environment. | b. | plants and
animals to produce more offspring than can survive. | c. | changes in the
frequency of certain alleles in a population. | d. | All of the
above | | |
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3.
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Refer
to the illustration above. The similarity of these structures suggests that the
organisms a. | have a common
ancestor. | c. | evolved
slowly. | b. | all grow at different rates. | d. | live for a long time. | | | | |
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4.
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The
mutation that made Mycobacterium tuberculosis resistant to antibiotics
involved a. | a missing
chromosome. | c. | a single base
change. | b. | an extra gene. | d. | None of the above | | | | |
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5.
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Beak
shape in finches is affected by a. | the number of predators in the
area. | c. | the color of the
finch. | b. | the size of the finch. | d. | the availability of food. | | | | |
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