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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The
average individuals of a population are favored in _____ selection. a. | natural | c. | directional | b. | stabilizing | d. | disruptive | | | | |
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2.
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Within a decade of the introduction of a new insecticide, nearly all of the
descendants of the target pests were immune to the usual-sized dose. The most likely explanation for
this immunity to the insecticide is that _____. a. | it selected random mutations that were present in the insect
population and that provided immunity to the insecticide | b. | eating the
insecticide caused the bugs to become resistant to it | c. | it destroyed
organisms that cause disease in the insects, thus allowing them to live
longer | d. | eating the insecticide caused the bugs to become less resistant
to it | | |
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3.
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The
variations needed for the origin of structural and physiological adaptations to occur are provided by
_____. a. | mimicry | c. | mutations | b. | gradual changes | d. | punctuated changes | | | | |
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4.
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Mutations occur because of _____. a. | the introduction of new variations through mistakes in DNA
replication | b. | the chance survival and reproduction of new
variations | c. | the introduction of new variations from
elsewhere | d. | change in allele or genotype
frequencies | | |
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5.
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Which
of the following is not a factor that causes changes in the frequency of homozygous and
heterozygous individuals in a population? a. | mutations | c. | migration | b. | genetic
drift | d. | random
mating | | | | |
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6.
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_____
selection favors one extreme form of a trait in a population. a. | Directional | c. | Natural | b. | Disruptive | d. | Stabilizing | | | | |
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7.
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Natural selection can best be defined as the _____. a. | survival and
reproduction of the organisms that occupy the largest area | b. | survival of the
biggest and strongest organisms in a population | c. | elimination of
the smallest organisms by the biggest organisms | d. | survival and
reproduction of the organisms that are genetically best adapted to the
environment | | |
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8.
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Which
of the following lines of evidence for evolution is indirect? a. | fossils | c. | pesticide
resistance | b. | observed allele frequency
changes | d. | all of
these | | | | |
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9.
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Which
combination of characteristics in a population would provide the greatest potential for
evolutionary change? a. | large population, many
mutations | c. | large
population, few mutations | b. | small population, many
mutations | d. | small
population, few mutations | | | | |
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10.
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What
is the movement of genes into and out of a gene pool called? a. | migration | c. | direct
evolution | b. | nonrandom mating | d. | random mating | | | | |
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