Question 1

The prokaryotes that cause tooth decay have a _ relationship with humans.

Accepted Answer

A)  parasitic
B)  competitive
C)  mutualistic
D)  predatoryE) A) and C)
F) All of the above

Question 2

Which of the following is an example of predation?

Accepted Answer

A)  the vivid colors of the poison- arrow frog in Costa Rica
B)  a goldfinch feeding on the seeds of a thistle plant
C)  a lizard's camouflage
D)  a hawk swooping down quickly to capture,kill,and eat a prairie king snakeE) None of the above
F) All of the above D

Question 3

Given that CO2 is produced by cellular respiration,why does the amount of CO2 in the atmosphere remain relatively constant? (When answering this question,exclude the impact of human activities on atmospheric CO2.)

Accepted Answer

A)  CO2 mostly forms carbonate rocks.
B)  CO2 is converted in photosynthesis to carbohydrates.
C)  CO2 is split apart during photosynthesis.
D)  CO2 is trapped in dead organisms' bodies.E) A) and C)
F) A) and B)

Question 4

Which of the following statements about the phosphorus cycle is true?

Accepted Answer

A)  Plants release dissolved phosphorus ions in the soil.
B)  Guano can be used by farmers to add phosphorus to the soil.
C)  Phosphorus that drains from soils into the sea becomes part of new rock and will cycle back into living organisms.
D)  Phosphorus has its main abiotic reservoir in water.E) A) and C)
F) A) and B) B

Question 5

Which arrow shows CO2 released as a product of cellular respiration?

Accepted Answer

A)  arrow A
B)  arrow B
C)  arrow C
D)  arrow DE) A) and D)
F) A) and C)

Question 6

When a crocodile eats a fish,the interspecific interaction between the two could be expressed as for the crocodile and _ for the fish.

Accepted Answer

A)  + ...+
B)  - ...-
C)  + ...-
D)  - ...+E) A) and B)
F) None of the above

Question 7

Which of the following represents a step in the nitrogen cycle?

Accepted Answer

A)  nitrogen- fixing bacteria convert atmospheric nitrogen to ammonium
B)  nitrites bind to soil particles
C)  nitrogen- fixing bacteria convert atmospheric nitrogen to nitrates
D)  denitrifiers convert ammonium to atmospheric nitrogenE) B) and C)
F) A) and B)

Question 8

Which of the following processes does not occur in ecosystems?

Accepted Answer

A)  Carbon is cycled between biotic and abiotic forms.
B)  Energy flows through the system.
C)  Producers convert light energy to chemical energy.
D)  The energy source that powers the system is used by consumers to make organic compounds.E) A) and B)
F) A) and C)

Question 9

A community is composed of

Accepted Answer

A)  potentially interacting populations of different kinds of organisms.
B)  one species of organism living in a specific environment on Earth.
C)  the factors that constitute an organism's niche.
D)  living organisms and their nonliving environment.E) None of the above
F) B) and D)

Question 10

Eutrophication of a lake could occur if

Accepted Answer

A)  fish were removed.
B)  phosphate- rich detergents were dumped into the lake.
C)  fertilizers were applied in an insoluble form.
D)  runoff from overfertilized lawns was prevented from reaching the lake.E) All of the above
F) A) and D)

Question 11

Most plants have a variety of chemicals,spines,and thorns because the plants

Accepted Answer

A)  are camouflaged into their surroundings.
B)  feed on the organisms that try to eat them.
C)  cannot run away from herbivores.
D)  are relying upon Batesian mimicry.E) B) and D)
F) A) and B) C

Question 12

About how much of the energy in the producers of an ecosystem will be available to secondary consumers in this ecosystem?

Accepted Answer

A)  about 1%
B)  about 50%
C)  about 10%
D)  100%E) None of the above
F) A) and C)

Question 13

The sum total of a population's use of the biotic and abiotic resources of its habitat constitutes its

Accepted Answer

A)  environment.
B)  range.
C)  evolution.
D)  niche.E) C) and D)
F) A) and B)

Question 14

A biology teacher takes fish,algae,pond weed,invertebrates,and bottom muck from a local pond and establishes them in an aquarium.When the system is stable,the teacher seals it into a large,airtight glass box and leaves the box in a sunny location.After three months,the organisms in the aquarium appear alive and healthy.Which of the following statements about the experiment is true?

Accepted Answer

A)  The air in the glass box contains no carbon dioxide.
B)  Some of the energy in the system has moved from one organism to another during the three months.
C)  No energy has entered or left the glass box during the three months.
D)  During the three months,the biomass of animal life was greater than the biomass of plant life.E) B) and D)
F) All of the above

Question 15

In an ecosystem,you would expect to find interspecific competition between

Accepted Answer

A)  populations of two species that occupy the same niche.
B)  two wasp species that mimic each other's appearance.
C)  males and females of a species in which both sexes occupy the same niche.
D)  a prey species and its predator.E) C) and D)
F) A) and B)

Question 16

One reason it is important to understand community ecology is

Accepted Answer

A)  to provide an enriched habitat for humans.
B)  to aid in conservation of endangered species.
C)  for identification of stomach microbes.
D)  to understand the life cycle of fish,such as cichlids.E) B) and C)
F) C) and D)

Question 17

When two different populations in a community benefit from their relationship with each other,the result is called

Accepted Answer

A)  parasitism.
B)  benefism.
C)  competition.
D)  mutualism.E) A) and B)
F) All of the above

Question 18

When a New England farm is abandoned,its formerly plowed fields first become weedy meadows,then shrubby areas,and finally forest.This sequence of plant communities is an example of

Accepted Answer

A)  a trophic chain.
B)  secondary succession.
C)  primary succession
D)  evolution.E) A) and B)
F) C) and D)

Question 19

In a hypothetical food chain consisting of grass,grasshoppers,sparrows,and hawks,the grasshoppers are

Accepted Answer

A)  secondary producers.
B)  secondary consumers.
C)  primary consumers.
D)  primary producers.E) All of the above
F) B) and C)

Question 20

One of the most worrisome results of the large- scale clearing and cultivation of land is

Accepted Answer

A)  erosion and soil degradation.
B)  the inability fo supply enough food for growing populations.
C)  hurricanes.
D)  the inability to supply fresh water.E) A) and D)
F) None of the above

Exam 37: Communities and Ecosystems

The prokaryotes that cause tooth decay have a _ relationship with humans.

Correct Answer
verified

Which of the following is an example of predation?

Correct Answer
verified
D

Given that CO2 is produced by cellular respiration,why does the amount of CO2 in the atmosphere remain relatively constant? (When answering this question,exclude the impact of human activities on atmospheric CO2.)

Correct Answer
verified

Which of the following statements about the phosphorus cycle is true?

Correct Answer
verified
B

Which arrow shows CO2 released as a product of cellular respiration?

Correct Answer
verified

When a crocodile eats a fish,the interspecific interaction between the two could be expressed as for the crocodile and _ for the fish.

Correct Answer
verified

Which of the following represents a step in the nitrogen cycle?

Correct Answer
verified

Which of the following processes does not occur in ecosystems?

Correct Answer
verified

A community is composed of

Correct Answer
verified

Eutrophication of a lake could occur if

Correct Answer
verified

Most plants have a variety of chemicals,spines,and thorns because the plants

Correct Answer
verified
C

About how much of the energy in the producers of an ecosystem will be available to secondary consumers in this ecosystem?

Correct Answer
verified

The sum total of a population's use of the biotic and abiotic resources of its habitat constitutes its

Correct Answer
verified

Correct Answer
verified

In an ecosystem,you would expect to find interspecific competition between

Correct Answer
verified

One reason it is important to understand community ecology is

Correct Answer
verified

When two different populations in a community benefit from their relationship with each other,the result is called

Correct Answer
verified

When a New England farm is abandoned,its formerly plowed fields first become weedy meadows,then shrubby areas,and finally forest.This sequence of plant communities is an example of

Correct Answer
verified

In a hypothetical food chain consisting of grass,grasshoppers,sparrows,and hawks,the grasshoppers are

Correct Answer
verified

One of the most worrisome results of the large- scale clearing and cultivation of land is

Correct Answer
verified

Exam 37: Communities and Ecosystems

The prokaryotes that cause tooth decay have a _ relationship with humans.

Correct AnswerverifiedShow Answer

Which of the following is an example of predation?

Correct AnswerverifiedD

Given that CO2 is produced by cellular respiration,why does the amount of CO2 in the atmosphere remain relatively constant? (When answering this question,exclude the impact of human activities on atmospheric CO2.)

Correct AnswerverifiedShow Answer

Which of the following statements about the phosphorus cycle is true?

Correct AnswerverifiedB

Which arrow shows CO2 released as a product of cellular respiration?

Correct AnswerverifiedShow Answer

When a crocodile eats a fish,the interspecific interaction between the two could be expressed as for the crocodile and _ for the fish.

Correct AnswerverifiedShow Answer

Which of the following represents a step in the nitrogen cycle?

Correct AnswerverifiedShow Answer

Which of the following processes does not occur in ecosystems?

Correct AnswerverifiedShow Answer

A community is composed of

Correct AnswerverifiedShow Answer

Eutrophication of a lake could occur if

Correct AnswerverifiedShow Answer

Most plants have a variety of chemicals,spines,and thorns because the plants

Correct AnswerverifiedC

About how much of the energy in the producers of an ecosystem will be available to secondary consumers in this ecosystem?

Correct AnswerverifiedShow Answer

The sum total of a population's use of the biotic and abiotic resources of its habitat constitutes its

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In an ecosystem,you would expect to find interspecific competition between

Correct AnswerverifiedShow Answer

One reason it is important to understand community ecology is

Correct AnswerverifiedShow Answer

When two different populations in a community benefit from their relationship with each other,the result is called

Correct AnswerverifiedShow Answer

When a New England farm is abandoned,its formerly plowed fields first become weedy meadows,then shrubby areas,and finally forest.This sequence of plant communities is an example of

Correct AnswerverifiedShow Answer

In a hypothetical food chain consisting of grass,grasshoppers,sparrows,and hawks,the grasshoppers are

Correct AnswerverifiedShow Answer

One of the most worrisome results of the large- scale clearing and cultivation of land is

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified