Question 1

What eventually happens to the energy passed from one trophic level to the next in a food chain?

Accepted Answer

A)   It recycles back to the producers.
B)   It results in a much larger decomposer population.
C)   It is dissipated into the atmosphere.
D)   It is recaptured by another food chain.
E)   It is eventually sealed in fossil fuels such as coal and oil.F) A) and D)
G) A) and C)

Question 2

The ____ is made of a community of organisms plus its physical environment.

Accepted Answer

A)   food chain
B)   habitat
C)   niche
D)   ecosystem
E)   trophic levelF) D) and E)
G) A) and D)

Question 3

Approximately what percentage of the energy in one trophic level becomes incorporated into the next level?

Accepted Answer

A)   1%
B)   10%
C)   30%
D)   60%
E)   100%F) A) and E)
G) A) and D)

Question 4

List the four biogeochemical cycles that need to be in balance in order to have stable ecosystems.

Accepted Answer

1.Hydrological cycle...

Question 5

Less energy is available at the next trophic level because

Accepted Answer

A)   all the food is captured and eaten before it can reach the next trophic level.
B)   all of the food eaten is digested and absorbed.
C)   only a portion of the food that is digested becomes part of the organism's body.
D)   all of the absorbed food molecules are used as an energy source for ATP buildup in mitochondria.
E)   all of the food is absorbed, but not all can be used to make ATP.F) D) and E)
G) A) and B)

Question 6

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Accepted Answer

A)   phosphorus
B)   carbon
C)   nitrogen
D)   hydrological
E)   All of these will lead to cultural eutrophication.F) A) and E)
G) None of the above

Question 7

A detritus food chain begins

Accepted Answer

A)   in the ocean.
B)   with a producer.
C)   with decaying matter.
D)   with air pollution.
E)   with fungi.F) A) and B)
G) A) and C)

Question 8

Which kind of organism would be most likely to perform photosynthesis?

Accepted Answer

A)   omnivore
B)   herbivore
C)   decomposer
D)   autotroph
E)   carnivoreF) B) and E)
G) C) and D)

Question 9

The ultimate source of energy in ecosystems,even for humans,is

Accepted Answer

A)   heat from burning fuels.
B)   heat from muscle contraction.
C)   sunlight.
D)   electric light.
E)   ultraviolet light.F) None of the above
G) A) and C)

Question 10

The base of an ecological pyramid represents the

Accepted Answer

A)   producer trophic level.
B)   primary consumer trophic level.
C)   secondary consumer trophic level.
D)   top predator trophic level.
E)   decomposer trophic level.F) B) and E)
G) A) and D)

Question 11

Explain the steps in the hydrological cycle.

Accepted Answer

1.Evaporation occurs causing liquid wate...

Question 12

Which of the following is NOT true about a food web?

Accepted Answer

A)   It contains many food chains.
B)   It contains several trophic levels.
C)   It is usually stable.
D)   It interacts with the physical environment.
E)   It uses only the carbon cycle.F) A) and B)
G) All of the above

Question 13

Which of the following statements is false regarding the carbon cycle?

Accepted Answer

A)   Terrestrial plants take up carbon dioxide from the air.
B)   Aquatic plants exchange carbon dioxide directly with the atmosphere.
C)   Algae produce food for themselves and for heterotrophs.
D)   When organisms respire, a portion of carbon is returned to the atmosphere as carbon dioxide.
E)   The amount of bicarbonate in the water is in equilibrium with the amount of carbon dioxide in the air.F) A) and E)
G) A) and D)

Question 14

Fresh water makes up about ____ of the world's supply of water.

Accepted Answer

A)   three percent
B)   ten percent
C)   thirty percent
D)   half
E)   ninety percentF) C) and E)
G) B) and C)

Question 15

Inverted ecological pyramids can occur in what habitat?

Accepted Answer

A)   forest canopies
B)   deserts during rare rainfalls
C)   ocean shorelines with algae
D)   any ecosystem disturbed by human activity
E)   If studied closely, inverted pyramids never occur naturallyF) B) and E)
G) None of the above

Question 16

Which eats only plant foods?

Accepted Answer

A)   omnivore
B)   herbivore
C)   decomposer
D)   autotroph
E)   carnivoreF) B) and D)
G) C) and D)

Question 17

Which of the following is usually a limiting factor (nutrient) for plants?

Accepted Answer

A)   Nitrogen
B)   Nitrites
C)   Carbon dioxide
D)   Phosphates
E)   HydrogenF) C) and E)
G) All of the above

Question 18

Which of the following is a biotic factor in an ecosystem?

Accepted Answer

A)   the food chain
B)   inorganic nutrients
C)   water availability
D)   temperature
E)   sunlightF) B) and C)
G) C) and D)

Question 19

Energy flow in an ecosystem is NOT cyclic because energy is

Accepted Answer

A)   increased as you go up the energy pyramid.
B)   evenly spread out over many organisms.
C)   converted to many kinds of useful energy.
D)   totally destroyed as it is used.
E)   no longer useful when it is converted to heat.F) B) and E)
G) A) and E)

Exam 35: Nature of Ecosystems

Energy flow in an ecosystem is NOT cyclic because energy is

Correct Answer
verified

Which kind of organism would be most likely to perform photosynthesis?

Correct Answer
verified

Explain the steps in the hydrological cycle.

Correct Answer
verified
1.Evaporation occurs causing liquid wate...
View Answer

Which of the following statements is false regarding the carbon cycle?

Correct Answer
verified

Which eats only plant foods?

Correct Answer
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List the four biogeochemical cycles that need to be in balance in order to have stable ecosystems.

Correct Answer
verified
1.Hydrological cycle...
View Answer

Which of the following is usually a limiting factor (nutrient) for plants?

Correct Answer
verified

A detritus food chain begins

Correct Answer
verified

The ultimate source of energy in ecosystems,even for humans,is

Correct Answer
verified

Fresh water makes up about ____ of the world's supply of water.

Correct Answer
verified

What eventually happens to the energy passed from one trophic level to the next in a food chain?

Correct Answer
verified

Which of the following is a biotic factor in an ecosystem?

Correct Answer
verified

Inverted ecological pyramids can occur in what habitat?

Correct Answer
verified

The base of an ecological pyramid represents the

Correct Answer
verified

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Correct Answer
verified

Less energy is available at the next trophic level because

Correct Answer
verified

The ____ is made of a community of organisms plus its physical environment.

Correct Answer
verified

Approximately what percentage of the energy in one trophic level becomes incorporated into the next level?

Correct Answer
verified

Which of the following is NOT true about a food web?

Correct Answer
verified

Exam 35: Nature of Ecosystems

Energy flow in an ecosystem is NOT cyclic because energy is

Correct AnswerverifiedShow Answer

Which kind of organism would be most likely to perform photosynthesis?

Correct AnswerverifiedShow Answer

Explain the steps in the hydrological cycle.

Correct Answerverified1.Evaporation occurs causing liquid wate...View AnswerShow Answer

Which of the following statements is false regarding the carbon cycle?

Correct AnswerverifiedShow Answer

Which eats only plant foods?

Correct AnswerverifiedShow Answer

List the four biogeochemical cycles that need to be in balance in order to have stable ecosystems.

Correct Answerverified1.Hydrological cycle...View AnswerShow Answer

Which of the following is usually a limiting factor (nutrient) for plants?

Correct AnswerverifiedShow Answer

A detritus food chain begins

Correct AnswerverifiedShow Answer

The ultimate source of energy in ecosystems,even for humans,is

Correct AnswerverifiedShow Answer

Fresh water makes up about ____ of the world's supply of water.

Correct AnswerverifiedShow Answer

What eventually happens to the energy passed from one trophic level to the next in a food chain?

Correct AnswerverifiedShow Answer

Which of the following is a biotic factor in an ecosystem?

Correct AnswerverifiedShow Answer

Inverted ecological pyramids can occur in what habitat?

Correct AnswerverifiedShow Answer

The base of an ecological pyramid represents the

Correct AnswerverifiedShow Answer

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Correct AnswerverifiedShow Answer

Less energy is available at the next trophic level because

Correct AnswerverifiedShow Answer

The ____ is made of a community of organisms plus its physical environment.

Correct AnswerverifiedShow Answer

Approximately what percentage of the energy in one trophic level becomes incorporated into the next level?

Correct AnswerverifiedShow Answer

Which of the following is NOT true about a food web?

Correct AnswerverifiedShow Answer

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1.Evaporation occurs causing liquid wate...
View Answer

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1.Hydrological cycle...
View Answer

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