Question 1

While on the Beagle,Darwin was influenced by a book by Charles Lyell that suggested that Earth was ______ and sculpted by geologic processes that ______ today.

Accepted Answer

A)   old... continue
B)   old... no longer occur
C)   young... continue
D)   young... no longer occur

Question 2

Natural selection results in ______.

Accepted Answer

A)   increased genetic variation
B)   a population that is better adapted to a future environment
C)   a population that is adapted to its current environment
D)   an increase in the size of a population

Question 3

The founder effect differs from a population bottleneck in that the founder effect ______.

Accepted Answer

A)   requires a small population
B)   is a type of natural selection
C)   can only occur on an oceanic island colony
D)   involves the isolation of a small colony of individuals from a larger population

Question 4

The figure below shows what happens in insect populations when crops are sprayed with insecticides.This is an example of ______.

Accepted Answer

A)   natural selection
B)   genetic drift
C)   founder effect
D)   gene flow

Question 5

The similarity of the embryos of fish,frogs,birds,and humans is evidence of ______.

Accepted Answer

A)   analogy
B)   common ancestry
C)   genetic drift
D)   convergent evolution

Question 6

After surviving a bottleneck,a population recovers to the point where it consists of as many individuals as it did prior to the bottleneck.Which of the following statements is most likely to apply to this population?

Accepted Answer

A)   The postbottleneck population exhibits less genetic variation than the prebottleneck population.
B)   The bottleneck subjected the population to stabilizing selection.
C)   The postbottleneck population has less of a chance of going extinct than did the prebottleneck population.
D)   The postbottleneck population exhibits more genetic variation than the prebottleneck population.

Question 7

Which of the following is an example of stabilizing selection?

Accepted Answer

A)   The birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same.
B)   There is an increase in antibiotic-resistant strains of bacteria.
C)   There is an increase in the number of different breeds of dog.
D)   Garter snakes with different coloration patterns behave differently when threatened.

Question 8

The total collection of alleles in a population at any one time make up that population's ______.

Accepted Answer

A)   gene pool
B)   genotype
C)   heterozygosity
D)   polymorphic pool

Question 9

Which of the following is not a requirement of natural selection?

Accepted Answer

A)   differential reproductive success
B)   overproduction of offspring
C)   genetic variation
D)   catastrophic events

Question 10

The smallest biological unit that can evolve is the ______.

Accepted Answer

A)   species
B)   individual
C)   population
D)   phylum

Exam 13: How Populations Evolve

Which of the following is an example of stabilizing selection?

Correct Answer
verified

Natural selection results in ______.

Correct Answer
verified

The figure below shows what happens in insect populations when crops are sprayed with insecticides.This is an example of ______.

Correct Answer
verified

The similarity of the embryos of fish,frogs,birds,and humans is evidence of ______.

Correct Answer
verified

The total collection of alleles in a population at any one time make up that population's ______.

Correct Answer
verified

After surviving a bottleneck,a population recovers to the point where it consists of as many individuals as it did prior to the bottleneck.Which of the following statements is most likely to apply to this population?

Correct Answer
verified

The founder effect differs from a population bottleneck in that the founder effect ______.

Correct Answer
verified

Which of the following is not a requirement of natural selection?

Correct Answer
verified

While on the Beagle,Darwin was influenced by a book by Charles Lyell that suggested that Earth was and sculpted by geologic processes that today.

Correct Answer
verified

The smallest biological unit that can evolve is the ______.

Correct Answer
verified

Exam 13: How Populations Evolve

Which of the following is an example of stabilizing selection?

Correct AnswerverifiedShow Answer

Natural selection results in ______.

Correct AnswerverifiedShow Answer

The figure below shows what happens in insect populations when crops are sprayed with insecticides.This is an example of ______.

Correct AnswerverifiedShow Answer

The similarity of the embryos of fish,frogs,birds,and humans is evidence of ______.

Correct AnswerverifiedShow Answer

The total collection of alleles in a population at any one time make up that population's ______.

Correct AnswerverifiedShow Answer

After surviving a bottleneck,a population recovers to the point where it consists of as many individuals as it did prior to the bottleneck.Which of the following statements is most likely to apply to this population?

Correct AnswerverifiedShow Answer

The founder effect differs from a population bottleneck in that the founder effect ______.

Correct AnswerverifiedShow Answer

Which of the following is not a requirement of natural selection?

Correct AnswerverifiedShow Answer

While on the Beagle,Darwin was influenced by a book by Charles Lyell that suggested that Earth was ______ and sculpted by geologic processes that ______ today.

Correct AnswerverifiedShow Answer

The smallest biological unit that can evolve is the ______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

While on the Beagle,Darwin was influenced by a book by Charles Lyell that suggested that Earth was and sculpted by geologic processes that today.

Correct Answer
verified

Correct Answer
verified