Question 1

Read the following scenario to answer the following question(s) .
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction.
-When most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated,we expect to see that ______.

Accepted Answer

A)   artificial selection becomes a greater factor in microevolution
B)   the founder effect becomes increasingly important
C)   gene flow between populations is reduced
D)   microevolution no longer occursE) A) and B)
F) None of the above

Question 2

Gene flow is accomplished by ______.

Accepted Answer

A)   migration
B)   sexual recombination
C)   mutation
D)   natural selectionE) A) and C)
F) B) and C)

Question 3

Which of the following are homologous?

Accepted Answer

A)   the forelimb of a dog and the hindlimb of a cat
B)   the forelimb of a dog and the forelimb of a cat
C)   wings of a butterfly and wings of a sparrow
D)   the mouth of a mosquito and the beak of a hummingbirdE) B) and C)
F) A) and B)

Question 4

Read the following scenario to answer the following question(s) .
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction.
-Chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths.In some severely impacted populations,a few individuals have survived,perhaps because of some natural resistance.If these resistant individuals continue to survive and prosper,new resistant populations might emerge.This would be an example of ______.

Accepted Answer

A)   genetic drift
B)   natural selection
C)   the founder effect
D)   sexual selectionE) None of the above
F) A) and D)

Question 5

Research on flat-tailed horned lizards demonstrated that natural selection favored lizards that ______.

Accepted Answer

A)   ran faster when exposed to bright sunlight
B)   buried themselves faster when startled
C)   searched for ants hidden under logs
D)   had longer horns on the rear of the skullE) B) and D)
F) A) and C)

Question 6

Which of the following is a characteristic of a population at Hardy-Weinberg equilibrium?

Accepted Answer

A)   The population is subject to natural selection.
B)   The population is not evolving.
C)   Genetic drift is occurring.
D)   Gene flow in and out of the population occurs.E) All of the above
F) B) and C)

Question 7

Which one of the following statements is true?

Accepted Answer

A)   Natural selection works on variation already present in a population.
B)   Natural selection works on non-heritable traits.
C)   Individuals evolve through natural selection.
D)   Organisms evolve structures that they need.E) All of the above
F) A) and D)

Question 8

Which of the following is an example of sexual selection?

Accepted Answer

A)   Bacteria evolve resistance to antibiotics.
B)   Cheetahs experienced a population bottleneck.
C)   Peahens choose to mate with peacocks that have the most beautiful tails.
D)   Female butterflies have a higher survival rate than male butterflies.E) B) and D)
F) C) and D)

Question 9

Genetic drift is the result of ______.

Accepted Answer

A)   natural selection
B)   chance
C)   a large gene pool
D)   environmental variationE) None of the above
F) All of the above

Question 10

Natural selection ______.

Accepted Answer

A)   results in evolutionary adaptation
B)   is a very rare phenomenon
C)   does not affect allelic frequencies
D)   prepares organisms for future changes in the environmentE) B) and D)
F) None of the above

Question 11

Which of the following statements about the voyage of the Beagle is true?

Accepted Answer

A)   Its purpose was to identify the fastest route from the Atlantic to the Pacific Ocean.
B)   It lasted almost two years.
C)   It turned into a tremendous opportunity for Darwin to collect fossils, plants, and animals.
D)   It ended with the sinking of the ship off of the coast of Australia, almost four years into its journey.E) A) and B)
F) A) and C)

Question 12

What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years?

Accepted Answer

A)   bird fossils at the top of mountains in Argentina
B)   dinosaur bones in the Amazon basin
C)   marine snail fossils high up in the Andes mountains
D)   impressions of ocean waves at the top of a mountainE) B) and D)
F) B) and C)

Question 13

Which of the following is likely to be the result of polygenic inheritance?

Accepted Answer

A)   freckles
B)   an extra finger
C)   human height
D)   ABO blood typeE) B) and C)
F) B) and D) C

Question 14

Which one of the following will prevent significant genetic drift?

Accepted Answer

A)   Gene flow is absent.
B)   There is genetic variation.
C)   There is mutation.
D)   The population size is large.E) B) and D)
F) A) and B)

Question 15

In the Hardy-Weinberg formula,what does 2pq represent?

Accepted Answer

A)   frequency of the dominant allele
B)   frequency of heterozygotes
C)   frequency of the recessive allele
D)   frequency of the homozygous dominantsE) B) and D)
F) A) and B)

Question 16

Which of the following is an example of disruptive 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.E) B) and C)
F) All of the above

Question 17

If the frequency of one allele in a population is 0.7,what is the frequency of the alternate allele?

Accepted Answer

A)   0.09
B)   0.21
C)   0.30
D)   0.42E) B) and C)
F) A) and B) C

Question 18

During his trip on the Beagle,Darwin found that ______.

Accepted Answer

A)   plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found
B)   plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents
C)   fossils found on a particular continent were clearly not related to the plants and animals living on that continent today
D)   plants and animals were similar on every continent and in every type of regionE) A) and D)
F) C) and D)

Question 19

Examine the relationships between the elephants in the figure below.Which one of the following pairs is most closely related?

Accepted Answer

A)   Deinotherium and Platybelodon
B)   Barytherium and Stegodon
C)   Loxodonta africana and Loxodonta cyclotis
D)   Mammut and StegodonE) A) and C)
F) None of the above C

Question 20

The original source of genetic variation that serves as the raw material for natural selection is ______.

Accepted Answer

A)   mutation
B)   gene flow
C)   sexual recombination
D)   random fertilizationE) B) and C)
F) B) and D)

Exam 13: How Populations Evolve

Correct Answer
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Gene flow is accomplished by ______.

Correct Answer
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Which of the following are homologous?

Correct Answer
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Correct Answer
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Research on flat-tailed horned lizards demonstrated that natural selection favored lizards that ______.

Correct Answer
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Which of the following is a characteristic of a population at Hardy-Weinberg equilibrium?

Correct Answer
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Which one of the following statements is true?

Correct Answer
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Which of the following is an example of sexual selection?

Correct Answer
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Genetic drift is the result of ______.

Correct Answer
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Natural selection ______.

Correct Answer
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Which of the following statements about the voyage of the Beagle is true?

Correct Answer
verified

What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years?

Correct Answer
verified

Which of the following is likely to be the result of polygenic inheritance?

Correct Answer
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C

Which one of the following will prevent significant genetic drift?

Correct Answer
verified

In the Hardy-Weinberg formula,what does 2pq represent?

Correct Answer
verified

Which of the following is an example of disruptive selection?

Correct Answer
verified

If the frequency of one allele in a population is 0.7,what is the frequency of the alternate allele?

Correct Answer
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C

During his trip on the Beagle,Darwin found that ______.

Correct Answer
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Examine the relationships between the elephants in the figure below.Which one of the following pairs is most closely related?

Correct Answer
verified
C

The original source of genetic variation that serves as the raw material for natural selection is ______.

Correct Answer
verified

Exam 13: How Populations Evolve

Correct AnswerverifiedShow Answer

Gene flow is accomplished by ______.

Correct AnswerverifiedShow Answer

Which of the following are homologous?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Research on flat-tailed horned lizards demonstrated that natural selection favored lizards that ______.

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of a population at Hardy-Weinberg equilibrium?

Correct AnswerverifiedShow Answer

Which one of the following statements is true?

Correct AnswerverifiedShow Answer

Which of the following is an example of sexual selection?

Correct AnswerverifiedShow Answer

Genetic drift is the result of ______.

Correct AnswerverifiedShow Answer

Natural selection ______.

Correct AnswerverifiedShow Answer

Which of the following statements about the voyage of the Beagle is true?

Correct AnswerverifiedShow Answer

What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years?

Correct AnswerverifiedShow Answer

Which of the following is likely to be the result of polygenic inheritance?

Correct AnswerverifiedC

Which one of the following will prevent significant genetic drift?

Correct AnswerverifiedShow Answer

In the Hardy-Weinberg formula,what does 2pq represent?

Correct AnswerverifiedShow Answer

Which of the following is an example of disruptive selection?

Correct AnswerverifiedShow Answer

If the frequency of one allele in a population is 0.7,what is the frequency of the alternate allele?

Correct AnswerverifiedC

During his trip on the Beagle,Darwin found that ______.

Correct AnswerverifiedShow Answer

Examine the relationships between the elephants in the figure below.Which one of the following pairs is most closely related?

Correct AnswerverifiedC

The original source of genetic variation that serves as the raw material for natural selection is ______.

Correct AnswerverifiedShow Answer

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C

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C

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C

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