Question 1

Evolution answers the question of how life began.

Accepted Answer

A) True 
 B)False

Question 2

Natural populations usually fulfill the conditions needed for Hardy-Weinberg equilibrium.

Accepted Answer

A) True 
 B)False

Question 3

The entire collection of genes and alleles is a population's

Accepted Answer

A)   genotype.
B)   phenotype.
C)   dominant traits.
D)   recessive traits.
E)   gene pool.

Question 4

Individuals,who have one normal allele and one sickle cell allele,are able to resist malaria.This gives them a better chance of reaching reproductive age.This is known as

Accepted Answer

A)   heterozygote advantage.
B)   homozygote advantage.
C)   artificial selection.
D)   heterozygote disadvantage.
E)   dominant advantage. A

Question 5

The hundreds of dog breeds are a product of natural selection.

Accepted Answer

A) True 
 B)False

Question 6

The mode of natural selection in which extreme phenotypes are less fit than the optimal intermediate phenotype is

Accepted Answer

A)   directional selection.
B)   disruptive selection.
C)   stabilizing selection.
D)   artificial selection.
E)   uniformitarianism.

Question 7

A male peacock has enormous tail feathers that it uses in mating displays to attract females.While the tail feathers are an advantage in mating,what is the potential disadvantage of these feathers to the male?

Accepted Answer

A)   The feathers require a lot of energy to produce.
B)   Bright feathers make males less susceptible to predation.
C)   The feathers make the male more attractive to other males.
D)   There are no disadvantages to having large tail feathers.
E)   The large tail feathers would make it easier to fly.

Question 8

The founder effect occurs when

Accepted Answer

A)   large groups of individuals leave their home population and establish new settlements, mating only among themselves.
B)   small groups of individuals leave their home population and establish new settlements, mating only among themselves.
C)   many members of a population die, resulting in a great loss of genetic diversity.
D)   many members of a population reproduce causing too much genetic diversity within the population.
E)   small groups of individuals leave their home population and join established settlements, and mating with natives.

Question 9

Which type of genetic drift occurs when many members of a population die,resulting in a great loss of genetic diversity?

Accepted Answer

A)   the founder effect
B)   the bottleneck effect
C)   the directional effect
D)   the selective effect
E)   None of the answer choices are correct.

Question 10

Use the Hardy-Weinberg equations: p + q = 1 and p² + 2pq + q² = 1.If the dominant allele frequency is 0.8,what percent of the population will be homozygous dominant?

Accepted Answer

A)   0.32
B)   0.16
C)   0.04
D)   0.64
E)   0.40 D

Question 11

Darwin believed that because of "differential reproductive success" a population would change over time.

Accepted Answer

A) True 
 B)False

Question 12

Hardy-Weinberg equilibrium will not occur in a population in which

Accepted Answer

A)   mutations do not occur.
B)   individuals mate at random.
C)   natural selection does not occur.
D)   individuals immigrate or emigrate.
E)   sexual selection does not occur.

Question 13

Use the Hardy-Weinberg equations: p + q = 1 and p² + 2pq + q² = 1.If the dominant allele frequency is 0.8,what percentage of the population will be heterozygous?

Accepted Answer

A)   32%
B)   16%
C)   64%
D)   4%
E)   20%

Question 14

Farmers and horticulturalists bred broccoli,cauliflower,kale,and cabbage from the wild mustard plant through

Accepted Answer

A)   artificial selection.
B)   evolution.
C)   genetic drift.
D)   natural selection.
E)   sexual selection.

Question 15

The mode of natural selection in which two or more extreme phenotypes are fitter than the intermediate phenotype is

Accepted Answer

A)   directional selection.
B)   stabilizing selection.
C)   disruptive selection.
D)   artificial selection.
E)   uniformitarianism.

Question 16

Evolution occurs in individuals,not populations.

Accepted Answer

A) True 
 B)False

Question 17

Small,generation-by-generation changes to a population's gene pool is

Accepted Answer

A)   uniformitarianism.
B)   artificial selection.
C)   microevolution.
D)   natural selection.
E)   macroevolution. C

Question 18

Evolution occurs

Accepted Answer

A)   over generations.
B)   during one lifetime.
C)   at birth of an organism.
D)   when a mutation occurs.
E)   All answers are correct.

Question 19

Sexual selection is a type of natural selection resulting from variation in the ability to obtain mates.

Accepted Answer

A) True 
 B)False

Question 20

In an evolutionary sense,"fitness" refers to an organism's contribution to the next generation's gene pool.

Accepted Answer

A) True 
 B)False

Exam 12: Forces of Evolutionary Change

Evolution answers the question of how life began.

Correct AnswerverifiedShow Answer

Natural populations usually fulfill the conditions needed for Hardy-Weinberg equilibrium.

Correct AnswerverifiedShow Answer

The entire collection of genes and alleles is a population's

Correct AnswerverifiedShow Answer

Individuals,who have one normal allele and one sickle cell allele,are able to resist malaria.This gives them a better chance of reaching reproductive age.This is known as

Correct AnswerverifiedA

The hundreds of dog breeds are a product of natural selection.

Correct AnswerverifiedShow Answer

The mode of natural selection in which extreme phenotypes are less fit than the optimal intermediate phenotype is

Correct AnswerverifiedShow Answer

A male peacock has enormous tail feathers that it uses in mating displays to attract females.While the tail feathers are an advantage in mating,what is the potential disadvantage of these feathers to the male?

Correct AnswerverifiedShow Answer

The founder effect occurs when

Correct AnswerverifiedShow Answer

Which type of genetic drift occurs when many members of a population die,resulting in a great loss of genetic diversity?

Correct AnswerverifiedShow Answer

Use the Hardy-Weinberg equations: p + q = 1 and p² + 2pq + q² = 1.If the dominant allele frequency is 0.8,what percent of the population will be homozygous dominant?

Correct AnswerverifiedD

Darwin believed that because of "differential reproductive success" a population would change over time.

Correct AnswerverifiedShow Answer

Hardy-Weinberg equilibrium will not occur in a population in which

Correct AnswerverifiedShow Answer

Use the Hardy-Weinberg equations: p + q = 1 and p² + 2pq + q² = 1.If the dominant allele frequency is 0.8,what percentage of the population will be heterozygous?

Correct AnswerverifiedShow Answer

Farmers and horticulturalists bred broccoli,cauliflower,kale,and cabbage from the wild mustard plant through

Correct AnswerverifiedShow Answer

The mode of natural selection in which two or more extreme phenotypes are fitter than the intermediate phenotype is

Correct AnswerverifiedShow Answer

Evolution occurs in individuals,not populations.

Correct AnswerverifiedShow Answer

Small,generation-by-generation changes to a population's gene pool is

Correct AnswerverifiedC

Evolution occurs

Correct AnswerverifiedShow Answer

Sexual selection is a type of natural selection resulting from variation in the ability to obtain mates.

Correct AnswerverifiedShow Answer

In an evolutionary sense,"fitness" refers to an organism's contribution to the next generation's gene pool.

Correct AnswerverifiedShow Answer

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A

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D

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C

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