Question 1

Which of the following statements about mimicry is false?

Accepted Answer

A)  Generally,the number of mimics in a Müllerian mimicry system must be less than the number of models.
B)  Both Batesian and Müllerian mimicry depend on the ability of the predator to learn.
C)  In Müllerian mimicry,the participants are both mimics and models.
D)  In Batesian mimicry,the participants are either mimics or models.
E)  Batesian mimicry can best be described as parasitism;Müllerian mimicry can best be described as mutualism.F) A) and B)
G) B) and D)

Question 2

Competition between species is called ____________ competition.

Accepted Answer

A)  interspecific
B)  exploitative
C)  interference
D)  fundamental
E)  intraspecificF) A) and D)
G) A) and C)

Question 3

If in a relationship the organism growing on the host benefits,and the host is unharmed,the relationship is called

Accepted Answer

A)  parasitism.
B)  mutualism.
C)  commensalism.
D)  tolerance.
E)  predation.F) C) and D)
G) A) and D)

Question 4

Choose the letter of the best match from the following:
-Organisms are not specially protected and develop strategies to blend in the surroundings.

Accepted Answer

A)  coevolution
B)  aposematic coloration
C)  cryptic coloration
D)  secondary chemical compounds
E)  Batesian mimicryF) D) and E)
G) C) and D)

Question 5

All of the following factors can be important in determining the difference between a species' fundamental and realized niches.Select the exception.

Accepted Answer

A)  physical environment
B)  interspecific competition
C)  presence of a predator/parasite
D)  intraspecific competition
E)  presence of a commensalist that benefitsF) None of the above
G) A) and B)

Question 6

Chemicals that play the dominant role in protecting plants from being eaten by herbivores or predators are called

Accepted Answer

A)  primary compounds.
B)  secondary compounds.
C)  poisons.
D)  oils.
E)  amino acids.F) A) and D)
G) D) and E)

Question 7

Choose the letter of the best match from the following:
-Most important in the defense of plants against herbivores;compounds are characteristic of individual plant families.

Accepted Answer

A)  coevolution
B)  aposematic coloration
C)  cryptic coloration
D)  secondary chemical compounds
E)  Batesian mimicryF) B) and E)
G) None of the above

Question 8

In ________ mimicry,two or more unrelated but protected species resemble one another,thus achieving a kind of group defense.

Accepted Answer

A)  Batesian
B)  disruptive
C)  Müllerian
D)  cooperativeE) B) and C)
F) B) and D)

Question 9

Imagine two related species that have non-overlapping ranges.If the following events involving these two species were arranged in the order they likely occurred,which event would be third?

Accepted Answer

A)  sympatry
B)  character displacement
C)  interspecific competition
D)  range extension
E)  resource partitioningF) D) and E)
G) None of the above

Question 10

Which statement is an accurate interpretation of the outcome in an ecosystem when a major predator is removed?

Accepted Answer

A)  The remaining community adjusts and quickly becomes stable.
B)  The diversity of the ecosystem actually increases.
C)  The diversity of the ecosystem decreases since there is an increase in competition.
D)  The diversity of the ecosystem decreases because parasites become more of a problem.
E)  The diversity of the ecosystem decreases because new herbivores move in.F) C) and D)
G) A) and B)

Question 11

A symbiotic relationship in which both organisms benefit is

Accepted Answer

A)  parasitism.
B)  mutualism.
C)  commensalism.
D)  tolerance.
E)  predation.F) C) and E)
G) B) and E)

Question 12

A herbivore can avoid competition from other species for food by acquiring the ability to

Accepted Answer

A)  be tolerant to some secondary compounds,allowing it to feed on an underutilized resource.
B)  be tolerant to some primary compounds,allowing it to feed on an over utilized resource.
C)  become dormant and not require energy during hot,dry summer months.
D)  alter its reproductive behavior,allowing it to utilize scarce resources.
E)  switch to exploitative competition.F) All of the above
G) B) and C)

Question 13

Some insects that lack any specific chemical defenses blend with their environment to avoid predators.This type of defense strategy is called

Accepted Answer

A)  Batesian mimicry.
B)  apoptosis.
C)  cryptic coloration.
D)  warning coloration.
E)  Müllerian mimicry.F) A) and D)
G) B) and E)

Question 14

Lakes become eutrophic by

Accepted Answer

A)  accumulation of organic matter.
B)  loss of organic matter.
C)  circulation of water in the lake.
D)  free exchange of water with outside sources.
E)  an increase in the number of organisms.F) B) and C)
G) B) and E)

Question 15

Communities evolve to have greater biomass and species richness in a process called

Accepted Answer

A)  symbiosis.
B)  higher productivity.
C)  spatial heterogeneity.
D)  predictability.
E)  succession.F) All of the above
G) A) and D)

Question 16

Aposematic,or warning coloration,serves to protect an animal or plant by signaling to potential ________ to stay away.

Accepted Answer

A)  competitors
B)  predators
C)  mates
D)  rivalsE) All of the above
F) None of the above

Question 17

Which one of the following statements correctly defines the concept "ecotone" and describes its importance in the debate over what determines the makeup and functioning of communities?

Accepted Answer

A)  An ecotone is a place where the environment changes abruptly and that some plant communities are distinct in adjacent areas supports the individualistic concept of communities.
B)  An ecotone is a place where the environment changes abruptly and that some plant communities are distinct in adjacent areas supports the holistic concept of communities.
C)  An ecotone is a place where the environment changes gradually and that some plant communities are distinct in adjacent areas supports the individualistic concept of communities.
D)  An ecotone is a place where the environment changes gradually and that some plant communities are distinct in adjacent areas supports the holistic concept of communities.
E)  An ecotone is a place where the environment changes abruptly,but the communities living in adjacent areas do not.This supports neither the individualistic nor the holistic concepts.F) A) and B)
G) D) and E)

Question 18

Insects that lay eggs on living hosts are called

Accepted Answer

A)  ectoparasites.
B)  endoparasites.
C)  brood parasites.
D)  parasitoids.
E)  predators.F) B) and D)
G) A) and E)

Question 19

Plant morphological defenses do not include

Accepted Answer

A)  spikes and thorns.
B)  secondary compounds.
C)  plant hairs.
D)  deposits of silica-like substances in the leaves.
E)  nectar in the flowers.F) A) and B)
G) C) and D)

Question 20

Which of the following statements about symbiotic relationships is false?

Accepted Answer

A)  Plant-pollinator interaction is a good example of mutualism.
B)  Both mutualisms and commensalisms result from the process of coevolution.
C)  It is sometimes difficult to determine if a specific relationship is mutualism,commensalism,or parasitism.
D)  Parasites can sometimes influence the behavior of their hosts to facilitate completion of their life cycles.
E)  Mutualists sometimes become parasites.F) None of the above
G) A) and D)

Exam 57: Community of Ecology

If in a relationship the organism growing on the host benefits,and the host is unharmed,the relationship is called

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Which one of the following statements correctly defines the concept "ecotone" and describes its importance in the debate over what determines the makeup and functioning of communities?

Correct AnswerverifiedShow Answer

Imagine two related species that have non-overlapping ranges.If the following events involving these two species were arranged in the order they likely occurred,which event would be third?

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In ________ mimicry,two or more unrelated but protected species resemble one another,thus achieving a kind of group defense.

Correct AnswerverifiedShow Answer

Chemicals that play the dominant role in protecting plants from being eaten by herbivores or predators are called

Correct AnswerverifiedShow Answer

Which statement is an accurate interpretation of the outcome in an ecosystem when a major predator is removed?

Correct AnswerverifiedShow Answer

Competition between species is called ____________ competition.

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Which of the following statements about mimicry is false?

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Choose the letter of the best match from the following: -Most important in the defense of plants against herbivores;compounds are characteristic of individual plant families.

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Plant morphological defenses do not include

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Choose the letter of the best match from the following: -Organisms are not specially protected and develop strategies to blend in the surroundings.

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Some insects that lack any specific chemical defenses blend with their environment to avoid predators.This type of defense strategy is called

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Which of the following statements about symbiotic relationships is false?

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Aposematic,or warning coloration,serves to protect an animal or plant by signaling to potential ________ to stay away.

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Insects that lay eggs on living hosts are called

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Lakes become eutrophic by

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Communities evolve to have greater biomass and species richness in a process called

Correct AnswerverifiedShow Answer

A herbivore can avoid competition from other species for food by acquiring the ability to

Correct AnswerverifiedShow Answer

A symbiotic relationship in which both organisms benefit is

Correct AnswerverifiedShow Answer

All of the following factors can be important in determining the difference between a species' fundamental and realized niches.Select the exception.

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