Question 1

Organisms in all trophic levels may be consumed by decomposers.

Accepted Answer

A) True 
 B)False

Question 2

Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is

Accepted Answer

A)  possible only if you are a cannibal.
B)  possible since carbon cycles through the biosphere.
C)  impossible since carbon can't enter a living system more than once.
D)  highly unlikely since carbon is always tied up in molecules in organisms or minerals.E) A) and C)
F) All of the above

Question 3

A community that contains a low species diversity will often have a high species richness.

Accepted Answer

A) True 
 B)False

Question 4

Chemical cycling may involve which of the following?

Accepted Answer

A)  a reservoir unavailable to producers
B)  an exchange pool as a source from which organisms can acquire chemicals
C)  a biotic community in which chemicals move through food chains
D)  a geological component,in which chemicals move through the soil or the air
E)  All of the choices are correct.F) A) and B)
G) C) and E)

Question 5

Consider the following food chain: hawk - rabbit - clover.Each species will contain a different amount of calories in its body (clover: 10 calories,rabbit: 500 and hawk: 1200) .Each species has a different daily caloric requirement (clover: sunlight,rabbit: 100 calories,hawk: 300) . How many clover plants,per day,does it take to support one hawk?

Accepted Answer

A)  approximately 600 clover plants
B)  approximately 30 clover plants
C)  approximately 60 clover plants
D)  approximately 3 clover plants
E)  None,clover plants do not support hawks.F) C) and E)
G) A) and B)

Question 6

All food chains begin with a photosynthetic producer.

Accepted Answer

A) True 
 B)False

Question 7

All the populations of all the different species interacting with one another in the same environment is called

Accepted Answer

A)  diversity.
B)  a community.
C)  an ecosystem.
D)  predation.
E)  symbiosis.F) D) and E)
G) A) and B)

Question 8

Consider the following food chain: hawk - rabbit - clover.Each species will contain a different amount of calories in its body (clover: 10 calories,rabbit: 500 and hawk: 1200) .Each species has a different daily caloric requirement (clover: sunlight,rabbit: 100 calories,hawk: 300) . How many clover plants,per day,does it take to support one rabbit?

Accepted Answer

A)  approximately 100 plants
B)  approximately 10 plants
C)  approximately 50 plants
D)  approximately 3 plants
E)  approximately 1000 plantsF) B) and C)
G) C) and D)

Question 9

Which of the following associations between organism and nutrient source is incorrect?

Accepted Answer

A)  raccoons - omnivores
B)  cows - herbivores
C)  earthworms - detritivores
D)  bacteria - decomposers
E)  humans - carnivoresF) B) and D)
G) A) and B)

Question 10

_____ is the interaction between two species as both attempt to use the same environmental resources.

Accepted Answer

A)  Competition.
B)  A community.
C)  An ecosystem.
D)  Predation.
E)  Symbiosis.F) A) and D)
G) A) and B)

Question 11

The only heterotrophs required in an ecosystem are

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

As animals take in food energy approximately 10% of it is made available to the next level in the food chain.Which of the following is one of the ways in which the energy is used by the organism and not passed along?

Accepted Answer

A)  cellular respiration
B)  defecation
C)  excretion
D)  death
E)  All of these are ways in which the organism uses the energy.F) C) and D)
G) A) and D) E

Question 14

Which of the following statements about parasitism is NOT true?

Accepted Answer

A)  The host is generally larger than the parasite.
B)  An efficient parasite usually kills its host.
C)  Smaller parasites often live as endoparasites within the body of the host.
D)  Ectoparasites are attached to the outside of the host's body by specialized organs.
E)  Some organisms and all viruses are obligate parasites and must live inside a host.F) B) and D)
G) A) and E)

Question 15

MacArthur discovered that five species of warblers coexisted on spruce trees by foraging on the same caterpillar,but in different places of the tree canopy.This is

Accepted Answer

A)  an exception to the competitive exclusion principle.
B)  an exception based on birds taking longer to eventually compete and eliminate competitors.
C)  confirmation that all warblers were actually variations of the same species because different species couldn't coexist.
D)  an example of resource partitioning.E) All of the above
F) A) and B)

Question 16

If there are 12,000kg in the base of an ecological pyramid,how many kg will be found in the body tissue of the tertiary consumers?

Accepted Answer

A)  1200 kg
B)  120 kg
C)  12000 kg
D)  6000
E)  12F) A) and D)
G) C) and E)

Question 17

Energy flow in an ecosystem begins with

Accepted Answer

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

Question 18

Compared with the numbers of grasshoppers or deer,there are not a lot of mountain lions.The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Accepted Answer

A)  such animals do not tolerate other members like them.
B)  through natural selection,most fierce animals have been killed off by others.
C)  food chains are only 10 to 20% efficient at each step,and top carnivores are therefore limited by the availability of food in their range.
D)  only a few such animals are permitted by succession in a biome,and there are only a few biomes.E) All of the above
F) B) and D) C

Question 19

In an Asian rice paddy,carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves,stems,and roots of the same plant.They can survive at the same time in the same rice paddy because they occupy

Accepted Answer

A)  the same habitat but different niches.
B)  the same habitat and the same niche.
C)  the same niche but different habitats.
D)  different habitats and different niches.E) A) and B)
F) All of the above

Question 20

Which of the following associations is incorrect?

Accepted Answer

A)  omnivore - eats both producers and consumers
B)  herbivore - eats producers and performs photosynthesis
C)  detritivore - feeds on decomposing organic matter
D)  autotroph - performs photosynthesis or chemosynthesis
E)  carnivore - feeds on other consumersF) B) and C)
G) A) and C)

Exam 45: Community and Ecosystem Ecology

Organisms in all trophic levels may be consumed by decomposers.

Correct Answer
verified

Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is

Correct Answer
verified

A community that contains a low species diversity will often have a high species richness.

Correct Answer
verified

Chemical cycling may involve which of the following?

Correct Answer
verified

Correct Answer
verified

All food chains begin with a photosynthetic producer.

Correct Answer
verified

All the populations of all the different species interacting with one another in the same environment is called

Correct Answer
verified

Correct Answer
verified

Which of the following associations between organism and nutrient source is incorrect?

Correct Answer
verified

_____ is the interaction between two species as both attempt to use the same environmental resources.

Correct Answer
verified

The only heterotrophs required in an ecosystem are

Correct Answer
verified
C

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

Correct Answer
verified

As animals take in food energy approximately 10% of it is made available to the next level in the food chain.Which of the following is one of the ways in which the energy is used by the organism and not passed along?

Correct Answer
verified
E

Which of the following statements about parasitism is NOT true?

Correct Answer
verified

MacArthur discovered that five species of warblers coexisted on spruce trees by foraging on the same caterpillar,but in different places of the tree canopy.This is

Correct Answer
verified

If there are 12,000kg in the base of an ecological pyramid,how many kg will be found in the body tissue of the tertiary consumers?

Correct Answer
verified

Energy flow in an ecosystem begins with

Correct Answer
verified

Compared with the numbers of grasshoppers or deer,there are not a lot of mountain lions.The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Correct Answer
verified
C

In an Asian rice paddy,carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves,stems,and roots of the same plant.They can survive at the same time in the same rice paddy because they occupy

Correct Answer
verified

Which of the following associations is incorrect?

Correct Answer
verified

Exam 45: Community and Ecosystem Ecology

Organisms in all trophic levels may be consumed by decomposers.

Correct AnswerverifiedShow Answer

Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is

Correct AnswerverifiedShow Answer

A community that contains a low species diversity will often have a high species richness.

Correct AnswerverifiedShow Answer

Chemical cycling may involve which of the following?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

All food chains begin with a photosynthetic producer.

Correct AnswerverifiedShow Answer

All the populations of all the different species interacting with one another in the same environment is called

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following associations between organism and nutrient source is incorrect?

Correct AnswerverifiedShow Answer

_____ is the interaction between two species as both attempt to use the same environmental resources.

Correct AnswerverifiedShow Answer

The only heterotrophs required in an ecosystem are

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

As animals take in food energy approximately 10% of it is made available to the next level in the food chain.Which of the following is one of the ways in which the energy is used by the organism and not passed along?

Correct AnswerverifiedE

Which of the following statements about parasitism is NOT true?

Correct AnswerverifiedShow Answer

MacArthur discovered that five species of warblers coexisted on spruce trees by foraging on the same caterpillar,but in different places of the tree canopy.This is

Correct AnswerverifiedShow Answer

If there are 12,000kg in the base of an ecological pyramid,how many kg will be found in the body tissue of the tertiary consumers?

Correct AnswerverifiedShow Answer

Energy flow in an ecosystem begins with

Correct AnswerverifiedShow Answer

Compared with the numbers of grasshoppers or deer,there are not a lot of mountain lions.The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Correct AnswerverifiedC

In an Asian rice paddy,carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves,stems,and roots of the same plant.They can survive at the same time in the same rice paddy because they occupy

Correct AnswerverifiedShow Answer

Which of the following associations is incorrect?

Correct AnswerverifiedShow Answer

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C

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E

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C

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