Question 1

A relationship between different species in which one species lives in or on another is:

Accepted Answer

A)  Resource partitioning
B)  Coevolution
C)  Symbiosis
D)  Predation
E)  Niche sharingF) A) and B)
G) A) and C)

Question 2

In a process called bioremediation,chemicals accumulate in the highest trophic levels within a food chain.

Accepted Answer

A) True 
 B)False

Question 3

Walleye pike are which of the following?

Accepted Answer

A)  Secondary consumers
B)  Tertiary consumers
C)  Primary consumer
D)  Producers
E)  DecomposerF) B) and E)
G) C) and D)

Question 4

When Steller sea lions and harbor seals became less plentiful,orcas began using sea otters as a primary food source.

Accepted Answer

A) True 
 B)False

Question 5

How was the virus detected?

Accepted Answer

A)  By the presence of antibodies to the virus
B)  By the presence of double stranded RNA
C)  By signs of infection
D)  By the ability to grow at 65°C
E)  By the presence of viral proteinsF) B) and E)
G) B) and D)

Question 6

The virus in this study ____.

Accepted Answer

A)  Infected the plant
B)  Infected both the plant and fungus
C)  Infected the fungus
D)  Did not infect either the plant or fungusE) C) and D)
F) B) and C) C

Question 7

An organism's _____________________ is its position in the food chain,relative to the ecosystem's energy source.

Accepted Answer

A)  Habitat
B)  Niche
C)  Climax level
D)  Trophic level
E)  Keystone levelF) B) and D)
G) A) and D)

Question 8

Resource partitioning allows only a single species to use a resource.

Accepted Answer

A) True 
 B)False

Question 9

A type of symbiosis in which one member of the relationship benefits with no effect on the other is:

Accepted Answer

A)  Predation
B)  Mutualism
C)  Commensalism
D)  Parasitism
E)  Intraspecific competitionF) A) and E)
G) B) and C)

Question 10

The species that appear in a climax community usually are short-lived,early maturing,r-selected species that are strong competitors in a stable environment.

Accepted Answer

A) True 
 B)False

Question 11

The total amount of energy trapped by the autotrophs of an ecosystem is called:

Accepted Answer

A)  Net primary consumption
B)  Gross primary productivity
C)  Gross primary consumption
D)  Net primary productivity
E)  Net energy fixationF) None of the above
G) C) and D)

Question 12

Biomagnification usually happens for chemicals that:

Accepted Answer

A)  Dissolve in fat
B)  Dissolve in water
C)  Are not readily degraded and dissolve in fat
D)  Are not readily degraded and dissolve in water
E)  Are not readily degradedF) B) and D)
G) A) and D)

Question 13

Nitrogen fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange obtain food from the plants.Which reaction can these bacteria catalyze?

Accepted Answer

A)  Nitrogen gas (N2)  to nitrate (NO3) 
B)  Ammonia (NH3)  to nitrate (NO3) 
C)  Nitrogen gas (N2)  to ammonia (NH3) 
D)  Nitrate (NO3)  to ammonia (NH3) 
E)  Nitrate (NO3)  to nitrogen gas (N2) F) A) and B)
G) B) and C) C

Question 14

After taking antibiotics and developing a yeast infection in the genitourinary tract,the yeast infection lessens as the microbes that normally are present reestablish themselves.The reason for the lessening of the yeast infection is explained by:

Accepted Answer

A)  Predation
B)  Symbiosis
C)  The competitive exclusion principle
D)  The co-inclusion principle
E)  EndosymbiosisF) C) and D)
G) A) and B) C

Question 15

Species that are the first to colonize an area are termed:

Accepted Answer

A)  Keystone species
B)  Primary species
C)  Tertiary species
D)  Pioneer species
E)  Secondary speciesF) A) and B)
G) C) and E)

Question 16

Organisms that obtain their energy from producers or other consumers are:

Accepted Answer

A)  Autotroph and producer
B)  Producer and heterotroph
C)  Autotroph
D)  Producer
E)  HeterotrophF) B) and C)
G) All of the above

Question 17

The tidal zones in which the barnacles Balanus and Cthalamus thrive when both species are present illustrate the principle of:

Accepted Answer

A)  Symbiotic inclusion
B)  Parasitism
C)  Oceanic restriction
D)  Competitive exclusion
E)  None of the above are correctF) B) and C)
G) A) and E)

Question 18

Lichens live on the side of trees,getting better access to the sun,with no apparent harm to the tree.This is an example of:

Accepted Answer

A)  Commensalism
B)  Mutualism
C)  Parasitism
D)  Predation
E)  HerbivoryF) A) and B)
G) All of the above

Question 19

Walleye pike tend to live in deep waters and feed at night.Northern pike live in shallower waters and feed all day.Which of the following best explain these differences?

Accepted Answer

A)  Predation
B)  Parasitism
C)  Commensalism
D)  Competition
E)  MutualismF) All of the above
G) A) and B)

Question 20

The decline of the sea otter population in the Pacific Northwest has been attributed to:

Accepted Answer

A)  Pollution from an oil spill
B)  Predation by killer whales
C)  An increase in the water temperature
D)  Predation by Steller sea lions
E)  A genetic mutation causing a decrease of fertility in male ottersF) A) and D)
G) All of the above

Exam 37: Communities and Ecosystems

A relationship between different species in which one species lives in or on another is:

Correct AnswerverifiedShow Answer

In a process called bioremediation,chemicals accumulate in the highest trophic levels within a food chain.

Correct AnswerverifiedShow Answer

Walleye pike are which of the following?

Correct AnswerverifiedShow Answer

When Steller sea lions and harbor seals became less plentiful,orcas began using sea otters as a primary food source.

Correct AnswerverifiedShow Answer

How was the virus detected?

Correct AnswerverifiedShow Answer

The virus in this study ____.

Correct AnswerverifiedC

An organism's _____________________ is its position in the food chain,relative to the ecosystem's energy source.

Correct AnswerverifiedShow Answer

Resource partitioning allows only a single species to use a resource.

Correct AnswerverifiedShow Answer

A type of symbiosis in which one member of the relationship benefits with no effect on the other is:

Correct AnswerverifiedShow Answer

The species that appear in a climax community usually are short-lived,early maturing,r-selected species that are strong competitors in a stable environment.

Correct AnswerverifiedShow Answer

The total amount of energy trapped by the autotrophs of an ecosystem is called:

Correct AnswerverifiedShow Answer

Biomagnification usually happens for chemicals that:

Correct AnswerverifiedShow Answer

Nitrogen fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange obtain food from the plants.Which reaction can these bacteria catalyze?

Correct AnswerverifiedC

After taking antibiotics and developing a yeast infection in the genitourinary tract,the yeast infection lessens as the microbes that normally are present reestablish themselves.The reason for the lessening of the yeast infection is explained by:

Correct AnswerverifiedC

Species that are the first to colonize an area are termed:

Correct AnswerverifiedShow Answer

Organisms that obtain their energy from producers or other consumers are:

Correct AnswerverifiedShow Answer

The tidal zones in which the barnacles Balanus and Cthalamus thrive when both species are present illustrate the principle of:

Correct AnswerverifiedShow Answer

Lichens live on the side of trees,getting better access to the sun,with no apparent harm to the tree.This is an example of:

Correct AnswerverifiedShow Answer

Walleye pike tend to live in deep waters and feed at night.Northern pike live in shallower waters and feed all day.Which of the following best explain these differences?

Correct AnswerverifiedShow Answer

The decline of the sea otter population in the Pacific Northwest has been attributed to:

Correct AnswerverifiedShow Answer

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