Question 1

Many species might coexist in a particular environment by occupying different areas called

Accepted Answer

A)  biomes.
B)  habitats.
C)  territories.
D)  domains.
E)  ranges.F) A) and D)
G) D) and E)

Question 2

Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria.Widespread extinction was dramatically seen when

Accepted Answer

A)  artificial selection stopped.
B)  predatory fish were added.
C)  hybridization stopped.
D)  fishing was prohibiteD.
E)  insect larvae stocks were depleted.F) A) and B)
G) B) and C)

Question 3

Due to character displacement,two closely related species may differ most morphologically when they

Accepted Answer

A)  are allopatric.
B)  are sympatric.
C)  occupy the same niche.
D)  occupy different niches.
E)  share a common ancestor.F) C) and D)
G) B) and C) B

Question 4

A _______ is a group of organisms that differs in one or more characteristics from other groups,and does not hybridize or intermate extensively if they occur together in nature.

Accepted Answer

The answer of A _______ is a group of organisms...

Question 5

Once species have formed,they keep their identity by

Accepted Answer

A)  developmental differences.
B)  genetic blocks.
C)  isolating mechanisms.
D)  somatic mutations.
E)  structural modifications.F) None of the above
G) A) and B)

Question 6

The distinctive role of a species in nature is its

Accepted Answer

A)  fitness.
B)  adaptation.
C)  habitat.
D)  niche.
E)  life cyclE.F) A) and B)
G) A) and C)

Question 7

All of the following describe members of a species except

Accepted Answer

A)  they have several isolated gene pools.
B)  they differ from other species in one or more characteristics.
C)  they cannot hybridize freely with other species members.
D)  they can interbreed freely with all other members.
E)  for potential gene flow with all other members.F) B) and D)
G) A) and B)

Question 8

The biological species concept of Ernst Mayr can be applied to all of the following except

Accepted Answer

A)  sympatric organisms.
B)  allopatric organisms.
C)  eukaryotic organisms.
D)  prokaryotic organisms.
E)  asexually-reproducing organisms.F) B) and D)
G) A) and B)

Question 9

Which one of the following could not apply to a postzygotic isolating mechanism?

Accepted Answer

A)  Hybrids are sterile.
B)  Hybrids develop abnormally.
C)  Hybrids fail to become established in nature.
D)  Hybrids are selected against.
E)  Hybrids cannot be formed.F) B) and D)
G) B) and C)

Question 10

Which of the following choices correctly presents only prezygotic isolating mechanisms?

Accepted Answer

A)  geographical isolation,ecological isolation,behavioral isolation,and hybrid sterility
B)  temporal isolation,mechanical isolation,hybrid adults die before mating,geographical isolation
C)  ecological isolation,geographical isolation,mechanical isolation,hybrid sterility
D)  geographical isolation,temporal isolation,behavioral isolation,mechanical isolationE) A) and B)
F) All of the above

Question 11

Recurrent isolation promotes _______.

Accepted Answer

speciation

Question 12

One of the main isolating mechanisms among hundreds of species of Drosophila in Hawaii appears to be

Accepted Answer

A)  behavioral.
B)  temporal.
C)  geographical.
D)  mechanical.
E)  none of the choices.F) B) and E)
G) C) and E)

Question 13

The type of speciation that geographically isolates populations and results in the divergence of distinct species is called ____________ speciation.

Accepted Answer

A)  gradual
B)  sympatric
C)  allopatric
D)  sexual
E)  adaptiveF) B) and D)
G) None of the above

Question 14

If two species are able to mate and produce an offspring which can mate with itself,but which is unable to mate with its parent's species then this can best be described as an example of

Accepted Answer

A)  allopatric speciation.
B)  sympatric speciation via disruptive selection.
C)  sympatric speciation via polyploidy.
D)  a species cluster.
E)  character displacement.F) All of the above
G) A) and D)

Question 15

The biological species concept of Ernst Mayr can be applied to all of the following except

Accepted Answer

A)  sympatric organisms.
B)  allopatric organisms.
C)  eukaryotic organisms.
D)  prokaryotic organisms.
E)  fossil organisms.F) B) and E)
G) All of the above E

Question 16

Two populations that inhabit the same area but remain genetically distinct can best be called

Accepted Answer

A)  species.
B)  subspecies (races) .
C)  polymorphiC.
D)  allopatric species.
E)  sympatric species.F) C) and D)
G) C) and E)

Question 17

Which one of the following statements about the diversity of Darwin's finches on the Galápagos Islands is false?

Accepted Answer

A)  All of the finches share a common ancestor that colonized the islands.
B)  Prior to the adaptive radiation of finches,there were many unoccupied habitats in the Galápagos Islands.
C)  The many islands in the Galápagos archipelago favored allopatric speciation.
D)  The adaptive radiation of Darwin's finches resulted from a key evolutionary innovation.
E)  There are several species clusters of finches.F) D) and E)
G) A) and E)

Question 18

The production of new species through hybridization is especially important in

Accepted Answer

A)  finches.
B)  fruit flies.
C)  humans.
D)  plants.
E)  mules.F) A) and D)
G) None of the above

Question 19

Which one of the following statements about mass extinctions is false?

Accepted Answer

A)  The five major mass extinctions were all followed by a rebound in species diversity.
B)  By definition,in mass extinctions all major groups are affected equally.
C)  Major changes in the direction of evolution have often occurred after mass extinctions.
D)  The five major mass extinctions were caused mainly by geological events and,perhaps,collision with asteroids.
E)  Rebound from the current,sixth mass extinction may be slower than in previous mass extinctions.F) None of the above
G) B) and D)

Question 20

Sympatric speciation can involve all of the following except

Accepted Answer

A)  disruptive selection.
B)  reproductive isolating mechanisms.
C)  autopolyploidy.
D)  two or more populations separated by a geographic barrier.
E)  allopolyploidy.F) A) and B)
G) A) and C)

Exam 22: The Origin of Species

Many species might coexist in a particular environment by occupying different areas called

Correct AnswerverifiedShow Answer

Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria.Widespread extinction was dramatically seen when

Correct AnswerverifiedShow Answer

Due to character displacement,two closely related species may differ most morphologically when they

Correct AnswerverifiedB

A _______ is a group of organisms that differs in one or more characteristics from other groups,and does not hybridize or intermate extensively if they occur together in nature.

Correct AnswerverifiedShow Answer

Once species have formed,they keep their identity by

Correct AnswerverifiedShow Answer

The distinctive role of a species in nature is its

Correct AnswerverifiedShow Answer

All of the following describe members of a species except

Correct AnswerverifiedShow Answer

The biological species concept of Ernst Mayr can be applied to all of the following except

Correct AnswerverifiedShow Answer

Which one of the following could not apply to a postzygotic isolating mechanism?

Correct AnswerverifiedShow Answer

Which of the following choices correctly presents only prezygotic isolating mechanisms?

Correct AnswerverifiedShow Answer

Recurrent isolation promotes _______.

Correct Answerverifiedspeciation

One of the main isolating mechanisms among hundreds of species of Drosophila in Hawaii appears to be

Correct AnswerverifiedShow Answer

The type of speciation that geographically isolates populations and results in the divergence of distinct species is called ____________ speciation.

Correct AnswerverifiedShow Answer

If two species are able to mate and produce an offspring which can mate with itself,but which is unable to mate with its parent's species then this can best be described as an example of

Correct AnswerverifiedShow Answer

The biological species concept of Ernst Mayr can be applied to all of the following except

Correct AnswerverifiedE

Two populations that inhabit the same area but remain genetically distinct can best be called

Correct AnswerverifiedShow Answer

Which one of the following statements about the diversity of Darwin's finches on the Galápagos Islands is false?

Correct AnswerverifiedShow Answer

The production of new species through hybridization is especially important in

Correct AnswerverifiedShow Answer

Which one of the following statements about mass extinctions is false?

Correct AnswerverifiedShow Answer

Sympatric speciation can involve all of the following except

Correct AnswerverifiedShow Answer

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B

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speciation

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E

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