Question 1

What information is contained in the branches of a cladogram?

Accepted Answer

A)   a current species and its descendants
B)   a recent common ancestor and two outgroups
C)   a recent common ancestor and all of its descendants
D)   all of the potential ancestors of a group
E)   all species classified in a particular genusF) A) and B)
G) B) and C)

Question 2

Two populations of insects interbreed, producing fertile offspring. Due to glacial activity, the two populations become isolated. Many years later, the populations are reunited but they no longer mate at the same time, nor can they produce fertile offspring. These insects

Accepted Answer

A)   began as one species and therefore remain one species.
B)   were originally two species and remain two species.
C)   were originally two species but are now one species.
D)   were originally one species but are now two species.
E)   The number of species cannot be determined from the information given.F) B) and D)
G) A) and E)

Question 3

Which of the following is the only source of new variation in a population?

Accepted Answer

A)   gene flow
B)   genetic drift
C)   mutation
D)   nonrandom reproduction
E)   natural selectionF) D) and E)
G) None of the above

Question 4

If a population goes from an allele frequency of 0.12 A & 0.88 a to 0.23 A & 0.77 a in the course of seven generations, we can conclude the population is evolving.

Accepted Answer

A) True 
 B)False

Question 5

The model of evolution that proposes rapid periods of speciation followed by long periods of stasis is known as

Accepted Answer

A)   genetic drift.
B)   phyletic gradualism.
C)   sympatric speciation.
D)   punctuated equilibrium.
E)   the biological species concept.F) A) and C)
G) A) and B)

Question 6

If all the conditions of the Hardy-Weinberg equilibrium are met

Accepted Answer

A)   then a population becomes better adapted to an unchanging environment.
B)   then a population becomes better adapted to a changing environment.
C)   this indicates allele frequencies are changing but the population is not adapting.
D)   there is no evolution because the allele frequencies remain the same.
E)   there is no evolution because the allele frequencies in the population are changing.F) C) and E)
G) A) and E)

Question 7

Name the isolating mechanisms that exist within nature and indicate which ones are prezygotic and which ones are postzygotic.

Accepted Answer

Prezygotic: habitat isolation,...

Question 8

Homologous structures such as the bones in wings, flippers, and arms are most closely concerned with

Accepted Answer

A)   comparative anatomy.
B)   biogeography.
C)   the fossil record.
D)   comparative embryology.
E)   comparative biochemistry.F) A) and E)
G) C) and D)

Question 9

What evidence would be studied by a biogeographer?

Accepted Answer

A)   continental drift or the movement of tectonic plates over time
B)   amount of genetic similarity among current populations
C)   ocean currents and wind patterns
D)   ranges of animals and ability to migrate
E)   All of the answer choices describe evidence that would be studied by a biogeographer.F) D) and E)
G) A) and B)

Question 10

Summarize the four main observations that make up Darwin's theory of natural selection.

Accepted Answer

1. Individual organisms within a species...

Question 11

If there is gene flow between two adjacent populations of the same species, they will

Accepted Answer

A)   have similar gene pools.
B)   become genetically isolated from each other.
C)   develop into different species.
D)   experience directional selection.
E)   merge into one population.F) C) and E)
G) A) and C)

Question 12

Which of the following describes allopatric speciation?

Accepted Answer

A)   Gene flow between subpopulations minimizes differences in their gene pools.
B)   A single population suddenly divides into two reproductively isolated groups without being geographically isolated.
C)   A geographic separation occurs between subpopulations leading to reproductive isolation.
D)   Wide phenotypic differences that appear between subpopulations due to variation in their environments.
E)   Subpopulations that are geographically isolated but still able to interbreed.F) A) and E)
G) B) and D)

Question 13

According to the proposed three-domain system,

Accepted Answer

A)   archaea and eukarya are more closely related than either is to the bacteria.
B)   archaea and bacteria are more closely related than either is to the eukarya.
C)   bacteria and eukarya are more closely related than either is to the archaea.
D)   all three groups arose separately.
E)   All three groups are equally related.F) A) and D)
G) A) and C)

Question 14

The idea that population growth is kept in check because an environment can support only a limited number of people was formulated by

Accepted Answer

A)   Stanley Miller.
B)   Charles Lyell.
C)   Thomas Malthus.
D)   Charles Darwin.
E)   Alfred Wallace.F) C) and D)
G) B) and C)

Question 15

Phylogeny refers to the

Accepted Answer

A)   development of an organism.
B)   evolutionary history of a species.
C)   taxonomic hierarchies of cladistics.
D)   reproductive isolation of species.
E)   naming of organisms.F) C) and E)
G) None of the above

Question 16

In a population, freckles is inherited as a dominant trait. Individuals that are homozygous recessive lack freckles. If 1% of the population lacks freckles, and the population is in Hardy-Weinberg equilibrium at this locus, what percentage of the next generation will lack freckles?

Accepted Answer

A)   None, since it is a recessive condition.
B)   1%
C)   2%
D)   50%
E)   99%F) C) and D)
G) A) and E)

Question 17

If the frequency of the dominant gene is 0.7, what is the frequency of the recessive gene?

Accepted Answer

A)   0.7
B)   0.49
C)   0.27
D)   0.3
E)   0.14F) A) and B)
G) B) and C)

Question 18

All living organisms share characteristics such as DNA, the molecule that passes information between generations; metabolic processes like glycolysis; and the ability to utilize specific energy sources. This is thought to be due to

Accepted Answer

A)   a common ancestor.
B)   limited environmental stimuli.
C)   the presence of transitional forms.
D)   postzygotic isolation.
E)   prezygotic isolation.F) B) and C)
G) A) and E)

Question 19

For natural selection to act on a population, there must be

Accepted Answer

A)   variation among members of the population.
B)   more offspring born than the environment can support.
C)   some members of the population that have greater reproductive success.
D)   variation that is heritable.
E)   All of the answer choices describe requirements for natural selection.F) A) and D)
G) C) and D)

Exam 27: Evolution of Life

Phylogeny refers to the

Correct Answer
verified

If all the conditions of the Hardy-Weinberg equilibrium are met

Correct Answer
verified

Homologous structures such as the bones in wings, flippers, and arms are most closely concerned with

Correct Answer
verified

Name the isolating mechanisms that exist within nature and indicate which ones are prezygotic and which ones are postzygotic.

Correct Answer
verified
Prezygotic: habitat isolation,...
View Answer

Summarize the four main observations that make up Darwin's theory of natural selection.

Correct Answer
verified
1. Individual organisms within a species...
View Answer

If there is gene flow between two adjacent populations of the same species, they will

Correct Answer
verified

The idea that population growth is kept in check because an environment can support only a limited number of people was formulated by

Correct Answer
verified

According to the proposed three-domain system,

Correct Answer
verified

In a population, freckles is inherited as a dominant trait. Individuals that are homozygous recessive lack freckles. If 1% of the population lacks freckles, and the population is in Hardy-Weinberg equilibrium at this locus, what percentage of the next generation will lack freckles?

Correct Answer
verified

If the frequency of the dominant gene is 0.7, what is the frequency of the recessive gene?

Correct Answer
verified

Which of the following is the only source of new variation in a population?

Correct Answer
verified

What information is contained in the branches of a cladogram?

Correct Answer
verified

The model of evolution that proposes rapid periods of speciation followed by long periods of stasis is known as

Correct Answer
verified

What evidence would be studied by a biogeographer?

Correct Answer
verified

Which of the following describes allopatric speciation?

Correct Answer
verified

If a population goes from an allele frequency of 0.12 A & 0.88 a to 0.23 A & 0.77 a in the course of seven generations, we can conclude the population is evolving.

Correct Answer
verified

All living organisms share characteristics such as DNA, the molecule that passes information between generations; metabolic processes like glycolysis; and the ability to utilize specific energy sources. This is thought to be due to

Correct Answer
verified

For natural selection to act on a population, there must be

Correct Answer
verified

Two populations of insects interbreed, producing fertile offspring. Due to glacial activity, the two populations become isolated. Many years later, the populations are reunited but they no longer mate at the same time, nor can they produce fertile offspring. These insects

Correct Answer
verified

Exam 27: Evolution of Life

Phylogeny refers to the

Correct AnswerverifiedShow Answer

If all the conditions of the Hardy-Weinberg equilibrium are met

Correct AnswerverifiedShow Answer

Homologous structures such as the bones in wings, flippers, and arms are most closely concerned with

Correct AnswerverifiedShow Answer

Name the isolating mechanisms that exist within nature and indicate which ones are prezygotic and which ones are postzygotic.

Correct AnswerverifiedPrezygotic: habitat isolation,...View AnswerShow Answer

Summarize the four main observations that make up Darwin's theory of natural selection.

Correct Answerverified1. Individual organisms within a species...View AnswerShow Answer

If there is gene flow between two adjacent populations of the same species, they will

Correct AnswerverifiedShow Answer

The idea that population growth is kept in check because an environment can support only a limited number of people was formulated by

Correct AnswerverifiedShow Answer

According to the proposed three-domain system,

Correct AnswerverifiedShow Answer

In a population, freckles is inherited as a dominant trait. Individuals that are homozygous recessive lack freckles. If 1% of the population lacks freckles, and the population is in Hardy-Weinberg equilibrium at this locus, what percentage of the next generation will lack freckles?

Correct AnswerverifiedShow Answer

If the frequency of the dominant gene is 0.7, what is the frequency of the recessive gene?

Correct AnswerverifiedShow Answer

Which of the following is the only source of new variation in a population?

Correct AnswerverifiedShow Answer

What information is contained in the branches of a cladogram?

Correct AnswerverifiedShow Answer

The model of evolution that proposes rapid periods of speciation followed by long periods of stasis is known as

Correct AnswerverifiedShow Answer

What evidence would be studied by a biogeographer?

Correct AnswerverifiedShow Answer

Which of the following describes allopatric speciation?

Correct AnswerverifiedShow Answer

If a population goes from an allele frequency of 0.12 A & 0.88 a to 0.23 A & 0.77 a in the course of seven generations, we can conclude the population is evolving.

Correct AnswerverifiedShow Answer

All living organisms share characteristics such as DNA, the molecule that passes information between generations; metabolic processes like glycolysis; and the ability to utilize specific energy sources. This is thought to be due to

Correct AnswerverifiedShow Answer

For natural selection to act on a population, there must be

Correct AnswerverifiedShow Answer

Two populations of insects interbreed, producing fertile offspring. Due to glacial activity, the two populations become isolated. Many years later, the populations are reunited but they no longer mate at the same time, nor can they produce fertile offspring. These insects

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
Prezygotic: habitat isolation,...
View Answer

Correct Answer
verified
1. Individual organisms within a species...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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