Question 1

In general, communities in early succession will be dominated by fast-growing species with r-selected life histories.

Accepted Answer

A) True 
 B)False

Question 2

A _________ relationship is one in which two or more kinds of organisms live together in often elaborate and more or less permanent association.

Accepted Answer

A)  symbiotic
B)  parasitic
C)  mutualistic
D)  synergisticE) A) and C)
F) A) and B)

Question 3

Insects that lay eggs on living hosts are called

Accepted Answer

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

Question 4

Geographical allopatry between species is definitive evidence of interspecific competition.

Accepted Answer

A) True 
 B)False

Question 5

A relationship in which both members benefit is called

Accepted Answer

A)  predation.
B)  parasitism.
C)  mutualism.
D)  commensalism.E) None of the above
F) A) and D)

Question 6

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) B) and D)
F) B) and C)

Question 7

The way in which an organism utilizes its environment may be called

Accepted Answer

A)  resource partitioning.
B)  its habitat.
C)  competitive exclusion.
D)  intraspecific competition.
E)  its niche.F) A) and E)
G) A) and D)

Question 8

Interspecific competition can affect the phenotypic characteristics of organisms.

Accepted Answer

A) True 
 B)False

Question 9

Garlic mustard is an invasive plant species in North American temperate forests.Garlic mustard secretes an allelochemical that interferes with relationships between native tree roots and their mycorrhizal fungi.This would be an example of

Accepted Answer

A)  interference competition.
B)  exploitative competition. The garlic mustard is releasing a chemical compound that disrupts the mutualistic relationship between native trees and mycorrhizal fungi.This would interfere with the trees' ability to uptake phosphorus.This is an example of interference competition.C) A) and B)
D) undefined

Question 10

Two species of warblers colonize the same island habitat.Both species nest in similar locations and eat the same type of prey.Eventually, competition will probably cause one species to

Accepted Answer

A)  migrate.
B)  grow exponentially.
C)  speciate.
D)  be eliminated. The competitive exclusion principle (56.2)  predicts that one species would be eliminated from that community.E) All of the above
F) None of the above

Question 11

Succession happens because species in the habitat alter that habitat in ways that assist other species.There are three dynamic concepts that are of critical importance for succession to take place.They are

Accepted Answer

A)  establishment, facilitation, and inhibition.
B)  symbiotic relationships, facilitation, and aposematic coloration.
C)  establishment, coevolution, and competitive exclusion.
D)  competition, climax communities, and tolerance.E) All of the above
F) A) and B)

Question 12

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) C) and D)
F) A) and D)

Question 13

The attempt of two organisms trying to utilize the same resource is called

Accepted Answer

A)  synergy.
B)  parasitism.
C)  competition.
D)  interference.E) All of the above
F) B) and D)

Question 14

Paleontological studies indicate that, over millions of years,

Accepted Answer

A)  groups of species that have coevolved rise and go extinct together.
B)  species that occurred together in the distant past still occur together today; the community has held constant.
C)  the extinction of species is not related to the community in which they lived.
D)  species seem to come and go individually as niches within a community become available.E) A) and B)
F) None of the above

Question 15

Resource partitioning can often be seen in similar species that occupy the same geographic area.These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called ____________ species.

Accepted Answer

A)  sympatric
B)  allopatric
C)  competitive
D)  fundamentalE) A) and B)
F) A) and C)

Question 16

In India, golden jackals that have been expelled from their pack have been known to attach themselves to a particular tiger, trailing it at a safe distance in order to feed on the big cat's kills.What type of relationship exists between the jackal and the tiger?

Accepted Answer

A)  mutualism
B)  predation
C)  parasitism
D)  competition
E)  commensalismF) C) and D)
G) B) and E)

Question 17

Communities with a high level of bacterial diversity are found in many habitats including soil and aquatic environments.Recent studies indicate this diversity is crucial to the functioning of these communities.The same studies have also found that phage abundance plays a critical role in the maintenance of the bacterial diversity within these communities.Are phages a density-dependent or a density-independent regulating factor?

Accepted Answer

A)  density-dependent
B)  density-independent Clarify question:C) A) and B)
D) undefined

Question 18

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) A) and B)
F) None of the above

Question 19

Based on the following graph, what is the most likely relationship between Paramecium and Didinium?

Accepted Answer

A)  Paramecium prey on Didinium.
B)  Paramecium have a commensal relationship with Didinium.
C)  Didinium and Paramecium have a mutualistic relationship.
D)  Didinium prey on Paramecium.E) C) and D)
F) All of the above

Question 20

Competition shapes communities because there are usually limited

Accepted Answer

A)  species.
B)  resources.
C)  interactions.
D)  nutrients.E) C) and D)
F) B) and D)

Exam 56: Community Ecology

A _________ relationship is one in which two or more kinds of organisms live together in often elaborate and more or less permanent association.

Correct Answer
verified

Resource partitioning can often be seen in similar species that occupy the same geographic area.These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called ____________ species.

Correct Answer
verified

Competition shapes communities because there are usually limited

Correct Answer
verified

Paleontological studies indicate that, over millions of years,

Correct Answer
verified

Based on the following graph, what is the most likely relationship between Paramecium and Didinium?

Correct Answer
verified

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

Correct Answer
verified

In general, communities in early succession will be dominated by fast-growing species with r-selected life histories.

Correct Answer
verified

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

Correct Answer
verified

In India, golden jackals that have been expelled from their pack have been known to attach themselves to a particular tiger, trailing it at a safe distance in order to feed on the big cat's kills.What type of relationship exists between the jackal and the tiger?

Correct Answer
verified

Insects that lay eggs on living hosts are called

Correct Answer
verified

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

Correct Answer
verified

A relationship in which both members benefit is called

Correct Answer
verified

Garlic mustard is an invasive plant species in North American temperate forests.Garlic mustard secretes an allelochemical that interferes with relationships between native tree roots and their mycorrhizal fungi.This would be an example of

Correct Answer
verified

Two species of warblers colonize the same island habitat.Both species nest in similar locations and eat the same type of prey.Eventually, competition will probably cause one species to

Correct Answer
verified

The attempt of two organisms trying to utilize the same resource is called

Correct Answer
verified

The way in which an organism utilizes its environment may be called

Correct Answer
verified

Correct Answer
verified

Succession happens because species in the habitat alter that habitat in ways that assist other species.There are three dynamic concepts that are of critical importance for succession to take place.They are

Correct Answer
verified

Interspecific competition can affect the phenotypic characteristics of organisms.

Correct Answer
verified

Geographical allopatry between species is definitive evidence of interspecific competition.

Correct Answer
verified

Exam 56: Community Ecology

A _________ relationship is one in which two or more kinds of organisms live together in often elaborate and more or less permanent association.

Correct AnswerverifiedShow Answer

Resource partitioning can often be seen in similar species that occupy the same geographic area.These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called ____________ species.

Correct AnswerverifiedShow Answer

Competition shapes communities because there are usually limited

Correct AnswerverifiedShow Answer

Paleontological studies indicate that, over millions of years,

Correct AnswerverifiedShow Answer

Based on the following graph, what is the most likely relationship between Paramecium and Didinium?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In general, communities in early succession will be dominated by fast-growing species with r-selected life histories.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In India, golden jackals that have been expelled from their pack have been known to attach themselves to a particular tiger, trailing it at a safe distance in order to feed on the big cat's kills.What type of relationship exists between the jackal and the tiger?

Correct AnswerverifiedShow Answer

Insects that lay eggs on living hosts are called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A relationship in which both members benefit is called

Correct AnswerverifiedShow Answer

Garlic mustard is an invasive plant species in North American temperate forests.Garlic mustard secretes an allelochemical that interferes with relationships between native tree roots and their mycorrhizal fungi.This would be an example of

Correct AnswerverifiedShow Answer

Two species of warblers colonize the same island habitat.Both species nest in similar locations and eat the same type of prey.Eventually, competition will probably cause one species to

Correct AnswerverifiedShow Answer

The attempt of two organisms trying to utilize the same resource is called

Correct AnswerverifiedShow Answer

The way in which an organism utilizes its environment may be called

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Succession happens because species in the habitat alter that habitat in ways that assist other species.There are three dynamic concepts that are of critical importance for succession to take place.They are

Correct AnswerverifiedShow Answer

Interspecific competition can affect the phenotypic characteristics of organisms.

Correct AnswerverifiedShow Answer

Geographical allopatry between species is definitive evidence of interspecific competition.

Correct AnswerverifiedShow Answer

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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