Question 1

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) C) and D)
G) A) and B)

Question 2

An inverted energy pyramid for an ecosystem,one where there are more consumers than producers at a given point in time,is possible if which of the following is true?

Accepted Answer

A)  Producers are reproducing more slowly than consumers.
B)  There is intense sunlight for long periods of time,as in the tropics.
C)  Producers are reproducing much more rapidly than consumers.
D)  Decomposers are reproducing much more rapidly than consumers.
E)  Consumers are reproducing more rapidly than producers.F) D) and E)
G) C) and D)

Question 3

A carbon atom will cycle between an organism and the atmosphere when it is taken up by a producer and is then eaten by an herbivore and eventually passed back into the atmosphere through respiration.The carbon atom has passed through which portions of the nutrient cycle?

Accepted Answer

A)  exchange pool to reservoir to exchange pool to reservoir
B)  living organism to long-term storage to living organism to long-term storage
C)  living organism to reservoir to living organism to exchange pool
D)  living organism to exchange pool to living organism to reservoir
E)  living organism to exchange pool to living organism to exchange poolF) A) and E)
G) A) and C)

Question 4

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) A) and D)
G) C) and D)

Question 5

Humans are biologically adapted to be

Accepted Answer

A)  omnivores.
B)  herbivores.
C)  decomposers.
D)  autotrophs.
E)  carnivores.F) B) and D)
G) C) and E)

Question 6

Which is NOT true about a complex food web?

Accepted Answer

A)  It remains stable.
B)  Populations tend to remain about the same size.
C)  Energy levels remain about the same for all trophic levels.
D)  Inputs are constant and outputs are minimal except for heat.
E)  Most of the energy entering the system maintains the whole community.F) C) and D)
G) B) and D)

Question 7

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) B) and C)
G) C) and E)

Question 8

Is the annual productivity of a typical city backyard large enough to support a house cat or will the cat require food supplements in order for it to survive?

Accepted Answer

A)  The producer productivity is large enough for the cat to survive.
B)  The cat must be fed additional food or it will starve.
C)  The cat will be able to survive if there is at least one fruit tree in the backyard as part of the producer productivity.
D)  The cat will be able to survive if the backyard consists only of grass.
E)  The producer productivity can support the cat along with several offspring.F) C) and E)
G) A) and E)

Question 9

Once a nutrient enters an ecosystem,it

Accepted Answer

A)  must remain in that ecosystem.
B)  can cycle endlessly in that ecosystem.
C)  must leave that ecosystem to enter into an organism.
D)  cannot leave that ecosystem.
E)  can only leave that ecosystem if it is carried by a living organism.F) C) and E)
G) C) and D)

Question 10

Energy flow in an ecosystem begins with

Accepted Answer

A)  omnivores.
B)  herbivores.
C)  decomposers.
D)  autotrophs.
E)  carnivores.F) B) and E)
G) A) and B)

Question 11

Settlers move into an area and harvest most of the foxes for fur.They are likely to see

Accepted Answer

A)  hawks die out.
B)  squirrel populations increase.
C)  grasshopper populations increase.
D)  hawk populations immediately increase.
E)  grasshoppers decrease.F) A) and C)
G) C) and E)

Question 12

In a grazing food chain,

Accepted Answer

A)  all the consumers are primary consumers.
B)  primary consumers eat photosynthetic organisms.
C)  primary consumers eat detritus.
D)  secondary consumers eat photosynthetic organisms.
E)  secondary consumers eat detritus.F) A) and E)
G) A) and D)

Question 13

Atmospheric CO2 combines with water to produce a bicarbonate which is

Accepted Answer

A)  a cause of the greenhouse effect.
B)  ozone.
C)  a source of carbon for algae.
D)  photochemical smog.
E)  a thermal inversion.F) A) and D)
G) A) and C)

Question 14

When settlers move into a wooded area,they slash and burn the woods,increasing grass production.Initially,they are likely to see

Accepted Answer

A)  foxes increase.
B)  squirrels increase.
C)  grasshoppers increase.
D)  hawks decrease.
E)  grasshoppers decrease.F) A) and B)
G) A) and C)

Question 15

When a plant produces food by photosynthesis,what is the fate of food stored as sugars,starches,etc.?

Accepted Answer

A)  All of the food stored by plants is eventually consumed by animal consumers.
B)  All of the food stored by plants is eventually consumed by either animals or decomposers.
C)  Most of the plant is consumed by animals and very little is consumed by decomposers.
D)  A portion of the food is used by the plant itself in cellular respiration and the rest is consumed by animals or by decomposers.
E)  A majority of the food is used by the plant itself in cellular respiration and very little is consumed by animals or by decomposers.F) B) and E)
G) All of the above

Question 16

The greenhouse effect is

Accepted Answer

A)  due to increased sunlight in recent years.
B)  caused by increased plant life and photosynthesis.
C)  a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
D)  a manmade hazard due to decreased levels of carbon dioxide and ozone in the atmosphere in recent years.
E)  not affected by human activities.F) D) and E)
G) C) and D)

Exam 35: Nature of Ecosystems

When settlers move into a wooded area,they slash and burn the woods,increasing grass production.Initially,they are likely to see

Correct Answer
verified

In a grazing food chain,

Correct Answer
verified

Energy flow in an ecosystem is NOT cyclic because energy is

Correct Answer
verified

Energy flow in an ecosystem begins with

Correct Answer
verified

Once a nutrient enters an ecosystem,it

Correct Answer
verified

When a plant produces food by photosynthesis,what is the fate of food stored as sugars,starches,etc.?

Correct Answer
verified

Which is NOT true about a complex food web?

Correct Answer
verified

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

Correct Answer
verified

An inverted energy pyramid for an ecosystem,one where there are more consumers than producers at a given point in time,is possible if which of the following is true?

Correct Answer
verified

Settlers move into an area and harvest most of the foxes for fur.They are likely to see

Correct Answer
verified

The greenhouse effect is

Correct Answer
verified

Is the annual productivity of a typical city backyard large enough to support a house cat or will the cat require food supplements in order for it to survive?

Correct Answer
verified

A carbon atom will cycle between an organism and the atmosphere when it is taken up by a producer and is then eaten by an herbivore and eventually passed back into the atmosphere through respiration.The carbon atom has passed through which portions of the nutrient cycle?

Correct Answer
verified

Humans are biologically adapted to be

Correct Answer
verified

Atmospheric CO₂ combines with water to produce a bicarbonate which is

Correct Answer
verified

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

Correct Answer
verified

Exam 35: Nature of Ecosystems

When settlers move into a wooded area,they slash and burn the woods,increasing grass production.Initially,they are likely to see

Correct AnswerverifiedShow Answer

In a grazing food chain,

Correct AnswerverifiedShow Answer

Energy flow in an ecosystem is NOT cyclic because energy is

Correct AnswerverifiedShow Answer

Energy flow in an ecosystem begins with

Correct AnswerverifiedShow Answer

Once a nutrient enters an ecosystem,it

Correct AnswerverifiedShow Answer

When a plant produces food by photosynthesis,what is the fate of food stored as sugars,starches,etc.?

Correct AnswerverifiedShow Answer

Which is NOT true about a complex food web?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An inverted energy pyramid for an ecosystem,one where there are more consumers than producers at a given point in time,is possible if which of the following is true?

Correct AnswerverifiedShow Answer

Settlers move into an area and harvest most of the foxes for fur.They are likely to see

Correct AnswerverifiedShow Answer

The greenhouse effect is

Correct AnswerverifiedShow Answer

Is the annual productivity of a typical city backyard large enough to support a house cat or will the cat require food supplements in order for it to survive?

Correct AnswerverifiedShow Answer

A carbon atom will cycle between an organism and the atmosphere when it is taken up by a producer and is then eaten by an herbivore and eventually passed back into the atmosphere through respiration.The carbon atom has passed through which portions of the nutrient cycle?

Correct AnswerverifiedShow Answer

Humans are biologically adapted to be

Correct AnswerverifiedShow Answer

Atmospheric CO2 combines with water to produce a bicarbonate which is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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verified

Atmospheric CO₂ combines with water to produce a bicarbonate which is

Correct Answer
verified

Correct Answer
verified