Question 1

Insects that lay eggs on living hosts are called

Accepted Answer

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

Question 2

Competition shapes communities because there are usually limited

Accepted Answer

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

Question 3

A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as

Accepted Answer

A)  a predator.
B)  a keystone species.
C)  the primary species.
D)  the dominant species.
E)  the alpha species.F) A) and C)
G) None of the above

Question 4

Forests,like other ecological systems,are subject to the species succession process.Which of the following would be characteristics of pioneer plant species facilitating the early stages of forest succession? (Check all that apply)
A)slow-growing
B)pollinated by animals
C)seedling growth requires direct sunlight
D)seeds germinate in the shade
E)plants produce great quantity of seeds

Accepted Answer

The answer of Forests,like other ecological systems,are subject to the...

Question 5

Chemical defenses are found in all of the following except

Accepted Answer

A)  marine animals.
B)  insects.
C)  plants.
D)  snakes,spiders,and fishes.
E)  Batesian mimics.F) A) and B)
G) C) and D)

Question 6

Mimicry is a form of camouflage.

Accepted Answer

A) True 
 B)False

Question 7

Resource partitioning would be most likely to occur between allopatric populations of species with similar ecological niches.

Accepted Answer

A) True 
 B)False

Question 8

Chemical compounds produced by plants that are not components of major metabolic pathways.

Accepted Answer

secondary chemical compounds

Question 9

All organisms living together in a place are called a

Accepted Answer

A)  community.
B)  population.
C)  species.
D)  ecosystem.E) All of the above
F) B) and C)

Question 10

Cardiac glycosides,molecules causing a drastic effect on vertebrate heart function,are produced as defensive chemicals by plants belonging to

Accepted Answer

A)  the milkweed and dogbane families.
B)  the mustard family.
C)  the grass family.
D)  the poison ivy,oak,and sumac families.
E)  the bean family.F) A) and D)
G) C) and D)

Question 11

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) A) and B)
G) B) and E)

Question 12

Which statement correctly interprets the graph?

Accepted Answer

A)  Paramecium caudatum drives Paramecium aurelia to near extinction.
B)  Paramecium aurelia drives Paramecium caudatum to near extinction.
C)  Paramecium caudatum and Paramecium aurelia are able to compete for the same resource and their population densities are not affected.
D)  Paramecium caudatum and Paramecium aurelia are unable to exist and both populations go extinct after 24 days.E) B) and C)
F) A) and D) A

Question 13

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 D)
F) A) and C)

Question 14

You have been studying the relationship between jackals and tigers in India.Until recently,the only relationship you have observed is that jackals will associate themselves with a particular tiger and follow it at a safe distance in order to feed on the big cat's kills.However,recently you observed a jackal alerting a tiger to a kill with a loud cry.If you continue to observe this alerting behavior,you might change the categorization of the jackal/tiger relationship from ________ to ________.

Accepted Answer

A)  mutualism; parasitism
B)  mutualism; commensalism
C)  commensalism; mutualism
D)  parasitism; mutualism
E)  competition; predationF) A) and B)
G) A) and C)

Question 15

Adaptation that enables organisms to blend into their environment thereby avoiding predation.

Accepted Answer

The answer of Adaptation that enables organisms to blend into...

Question 16

Which statement is the correct interpretation of the graph?

Accepted Answer

A)  The population of Didinium goes extinct with the addition of Paramecium on day 4.
B)  The population of Didinium continues to increase and remains high even after the extinction of the Paramecium.
C)  The population of Paramecium goes extinct with the addition of Didinium on day 8.
D)  The population of Didinium increased but then went extinct after the population of Paramecium went extinct.
E)  The population of Didinium is able to increase at the expense of the Paramecium population.After a brief period both populations are able to coexist.F) None of the above
G) A) and B)

Question 17

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 B)
G) A) and C)

Question 18

Following their respective breeding seasons,several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats.These flowers seem to have converged to a common morphology and color.Birds are most visually sensitive to the color red.Hummingbird flowers are pollinated by hummingbirds.Which of the following features of these flowers would indicate they have coevolved with hummingbirds? (Check all that apply)

Accepted Answer

A)  long tubular flowers
B)  flowers are colored violet and blue
C)  blooming time of the flowers coincides with the arrival of the hummingbirds
D)  flowers produce a high volume of nectar and sugar
E)  flowers are low to the groundF) B) and D)
G) A) and D)

Question 19

Which of the following statements about symbiotic relationships are true? Check all that apply.

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) C) and D)
G) All of the above

Question 20

Which of the following statements about the fundamental and realized niche are true? Check all that apply.

Accepted Answer

A)  A species' realized niche could be the same size as its fundamental niche.
B)  A species' realized niche could be smaller than its fundamental niche.
C)  A species' fundamental niche can be smaller than its realized niche.
D)  The extent of the realized niche is determined,in part,by interspecific competition.
E)  The extent of the fundamental niche is determined,in part,by conditions of the physical environment.F) B) and D)
G) D) and E)

Exam 55: Community Ecology

Insects that lay eggs on living hosts are called

Correct Answer
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D

Competition shapes communities because there are usually limited

Correct Answer
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A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as

Correct Answer
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Correct Answer
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Chemical defenses are found in all of the following except

Correct Answer
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Mimicry is a form of camouflage.

Correct Answer
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Resource partitioning would be most likely to occur between allopatric populations of species with similar ecological niches.

Correct Answer
verified

Chemical compounds produced by plants that are not components of major metabolic pathways.

Correct Answer
verified
secondary chemical compounds

All organisms living together in a place are called a

Correct Answer
verified

Cardiac glycosides,molecules causing a drastic effect on vertebrate heart function,are produced as defensive chemicals by plants belonging to

Correct Answer
verified

Lakes become eutrophic by

Correct Answer
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Which statement correctly interprets the graph?

Correct Answer
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A

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
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Correct Answer
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Adaptation that enables organisms to blend into their environment thereby avoiding predation.

Correct Answer
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Which statement is the correct interpretation of the graph?

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

Correct Answer
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Which of the following statements about symbiotic relationships are true? Check all that apply.

Correct Answer
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Which of the following statements about the fundamental and realized niche are true? Check all that apply.

Correct Answer
verified

Exam 55: Community Ecology

Insects that lay eggs on living hosts are called

Correct AnswerverifiedD

Competition shapes communities because there are usually limited

Correct AnswerverifiedShow Answer

A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Chemical defenses are found in all of the following except

Correct AnswerverifiedShow Answer

Mimicry is a form of camouflage.

Correct AnswerverifiedShow Answer

Resource partitioning would be most likely to occur between allopatric populations of species with similar ecological niches.

Correct AnswerverifiedShow Answer

Chemical compounds produced by plants that are not components of major metabolic pathways.

Correct Answerverifiedsecondary chemical compounds

All organisms living together in a place are called a

Correct AnswerverifiedShow Answer

Cardiac glycosides,molecules causing a drastic effect on vertebrate heart function,are produced as defensive chemicals by plants belonging to

Correct AnswerverifiedShow Answer

Lakes become eutrophic by

Correct AnswerverifiedShow Answer

Which statement correctly interprets the graph?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Adaptation that enables organisms to blend into their environment thereby avoiding predation.

Correct AnswerverifiedShow Answer

Which statement is the correct interpretation of the graph?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following statements about symbiotic relationships are true? Check all that apply.

Correct AnswerverifiedShow Answer

Which of the following statements about the fundamental and realized niche are true? Check all that apply.

Correct AnswerverifiedShow Answer

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D

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secondary chemical compounds

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A

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