Question 1

Which of thfollowing statements about parasites is TRUE?

Accepted Answer

A)  Parasites usually do not kill their hosts.
B)  The parasite species that infects a particular host species becomes less virulent over evolutionary time.
C)  Warm-blooded animals are frequently infected by parasites.
D)  Parasites usually do not kill their hosts, and the parasite species that infects a particular host species becomes less virulent over evolutionary time.
E)  Parasites usually do not kill their hosts, the parasite species that infects a particular host species becomes less virulent over evolutionary time, and warm-blooded animals are frequently infected by parasites.

Question 2

Endemic means a species

Accepted Answer

A)  evolved in one geographic region and does not live elsewhere.
B)  could cause an epidemic at anytime.
C)  is on its way to extinction.
D)  can live in only one habitat.
E)  is extinct.

Question 3

Carbon is storein what form?

Accepted Answer

A)  biomass
B)  fossil fuels
C)  limestone rocks
D)  shells of animals
E)  all of these

Question 4

Which of thfollowing organisms was introducein thUniteStates in order to control thpopulation of RIFAs?

Accepted Answer

A)  houseflies
B)  fruit flies
C)  phorid flies
D)  blue bottle flies
E)  flower flies

Question 5

In which of thfollowing ways does thfly kill a firant?

Accepted Answer

A)  A female fly lays an egg in the ant's soft tissues, and in the process of development, the resulting larvae kills the ant.
B)  A fly (male or female)  injects a poisonous substance in the ant which results in paralyzing its muscles.
C)  A fly (male or female)  injects a substance that sterilizes the ant.
D)  A fly (male or female)  causes the ant's death by depriving it from its necessary resources and habitat.
E)  A fly (male or female)  injects a substance that sterilizes the ant and paralyzes its muscles.

Question 6

Which of thfollowing is NOT truof ecosystems?

Accepted Answer

A)  Although they may include many different species, many features of ecosystem structure and function are alike.
B)  Autotrophs secure energy and nutrients that are then used by heterotrophs.
C)  Energy cycles and mineral flows in an ecosystem.
D)  Many different niches are represented in most ecosystems.
E)  Ecosystems are characterized by relatively few trophic levels.

Question 7

Thsimplfoochain, grass >>> zebra >>> lion provides a gooexamplof a pyramiof

Accepted Answer

A)  energy.
B)  heat.
C)  symbiosis.
D)  both energy and symbiosis.
E)  energy, heat, and symbiosis.

Question 8

Competitivexclusion is baseupon thidea that

Accepted Answer

A)  one species will voluntarily allow the other to survive.
B)  no two species can completely occupy the same niche.
C)  the larger species will dominate the smaller.
D)  competition is overrated as a factor in species survival.
E)  two species can live together, if they share the same niche but only at alternate times.

Question 9

Thplants ananimals now present on acreagfrowhich thtrees werremoveten years earlier represent

Accepted Answer

A)  primary succession.
B)  a climax forest.
C)  pioneer species.
D)  secondary succession.
E)  species introduction.

Question 10

Thpyramiof energy is

Accepted Answer

A)  a demonstration of the first law of thermodynamics.
B)  a result in the decline in the energy available as energy travels through the trophic levels.
C)  fundamentally different from the pyramid of biomass and the pyramid of numbers.
D)  just one of the manifestations of competition.
E)  the result of eating the correct foods.

Question 11

In a natural community, thprimary consumers are

Accepted Answer

A)  herbivores.
B)  carnivores.
C)  scavengers.
D)  decomposers.
E)  all of these.

Question 12

Four of thfivanswers listebelow arheterotrophic.Select thEXCEPTION.

Accepted Answer

A)  consumers
B)  carnivores
C)  herbivores
D)  parasites
E)  producers

Question 13

During thprocess of community succession,

Accepted Answer

A)  the total biomass remains constant.
B)  there are increasing possibilities for resource partitioning.
C)  the pioneer community quickly gives way to the climax community, followed by a succession of more diverse arrays of organisms.
D)  nutrients cycle more rapidly with time.
E)  all of these occur.

Question 14

A relationship between two species in which both species benefit is known as

Accepted Answer

A)  parasitism.
B)  mutualism
C)  competition.
D)  predation.
E)  commensalism.

Question 15

Primary carnivores are

Accepted Answer

A)  tertiary consumers in the third trophic level.
B)  secondary consumers in the third trophic level.
C)  secondary consumers in the second trophic level.
D)  tertiary consumers in the forth trophic level.
E)  also primary producers in aquatic ecosystems.

Question 16

Which of thfollowing is truof predation?

Accepted Answer

A)  A predator exerts selective pressure on its prey.
B)  A prey exerts selective pressure on its predator.
C)  In a typical predation case, the predator would not kill its prey.
D)  Feeding on carcasses is also an example of predation.
E)  Predator and prey exert selective pressure on one another.

Question 17

Which of thfollowing woulbmorlikely to affect thhabitat of an animal rather than its niche?

Accepted Answer

A)  rainfall
B)  prey abundance
C)  predators
D)  defense mechanisms
E)  competitors

Question 18

Decomposers perfortheir recycling efforts on organisms

Accepted Answer

A)  at the end of a food chain.
B)  on the top of a pyramid.
C)  that are producers.
D)  that are consumers.
E)  that are all of these.

Question 19

Which of thfollowing does NOT cyclthrough an ecosystem?

Accepted Answer

A)  carbon
B)  water
C)  energy
D)  nitrogen
E)  phosphorus

Question 20

Decomposers

Accepted Answer

A)  are able to enter the food chain at any trophic level.
B)  are the most numerous organisms in an ecosystem.
C)  include bacteria and fungi.
D)  are all of these.
E)  are none of these.

Exam 17: Communities and Ecosystems

In which of thfollowing ways does thfly kill a firant?

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Endemic means a species

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Thsimplfoochain, grass >>> zebra >>> lion provides a gooexamplof a pyramiof

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Competitivexclusion is baseupon thidea that

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Four of thfivanswers listebelow arheterotrophic.Select thEXCEPTION.

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Decomposers

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Which of thfollowing is NOT truof ecosystems?

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During thprocess of community succession,

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Which of thfollowing woulbmorlikely to affect thhabitat of an animal rather than its niche?

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Which of thfollowing does NOT cyclthrough an ecosystem?

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Which of thfollowing organisms was introducein thUniteStates in order to control thpopulation of RIFAs?

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In a natural community, thprimary consumers are

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Thplants ananimals now present on acreagfrowhich thtrees werremoveten years earlier represent

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Carbon is storein what form?

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Thpyramiof energy is

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Decomposers perfortheir recycling efforts on organisms

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Which of thfollowing statements about parasites is TRUE?

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Which of thfollowing is truof predation?

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Primary carnivores are

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A relationship between two species in which both species benefit is known as

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