Question 1

Walleye pike fish live in deep waters and feed at night.Another species of fish,the Northern pike,live in shallower waters and feed all day.Which of the following best explains these differences?

Accepted Answer

A)  predation
B)  parasitism
C)  commensalism
D)  resource partitioning
E)  mutualismF) None of the above
G) All of the above

Question 2

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 fixation.F) A) and D)
G) C) and D)

Question 3

A ______ makes up a small portion of the community by weight,yet exerts a disproportionate influence on community diversity.

Accepted Answer

A)  keystone species
B)  cornerstone species
C)  capstone species
D)  flagstone species
E)  None of the answers are correct.F) A) and B)
G) A) and D)

Question 4

The tilt of the Earth's axis produces distinct seasons in the northern and southern hemispheres as the Earth travels around the Sun.

Accepted Answer

A) True 
 B)False

Question 5

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the virus

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 fungus.E) B) and C)
F) A) and C)

Question 6

A food chain is a series of organisms that

Accepted Answer

A)  successively transfer energy,initially from the sun,to nutrition from eating others.
B)  share the same niche.
C)  exhibit mutualism with each other.
D)  share the same energy source.
E)  succeed one another as a climax community develops.F) A) and E)
G) A) and D)

Question 7

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65 ∘\circ∘ C need to employ to avoid dehydration?

Accepted Answer

A)  Transpiration would increase.
B)  Uptake of water through the phloem would increase.
C)  Transport of sugars through the xylem would decrease.
D)  Their stomata would be closeD.
E)  Their flowers would open. F) A) and B)
G) A) and E)

Question 8

Which of the following is NOT a type of symbiosis?

Accepted Answer

A)  parasitism
B)  mutualism
C)  commensalism
D)  predation
E)  None of the answers are correct.F) None of the above
G) B) and D)

Question 9

Which of the following is NOT an important biogeochemical cycle on Earth?

Accepted Answer

A)  ATP cycle
B)  water cycle
C)  carbon cycle
D)  phosphorus cycle
E)  nitrogen cycleF) A) and C)
G) A) and B)

Question 10

The total of all the resources,both biotic and abiotic,that a species exploits for its survival,growth,and reproduction is its

Accepted Answer

A)  competitive zone.
B)  habitat.
C)  food web.
D)  niche.
E)  biospherE.F) C) and D)
G) A) and D)

Question 11

If you went diving in a freshwater lake,you would see very few rooted aquatic plants after a certain depth.What limits plant growth in deeper water?

Accepted Answer

A)  cold temperatures
B)  a lack of nutrients
C)  a lack of light
D)  too many herbivores
E)  a lack of oxygenF) B) and D)
G) A) and E)

Question 12

The term "abiotic" means "nonliving."

Accepted Answer

A) True 
 B)False

Question 13

In a process called denitrification,bacteria convert ammonia to nitrites and eventually to nitrates.

Accepted Answer

A) True 
 B)False

Question 14

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 15

Secondary consumers

Accepted Answer

A)  are carnivores.
B)  are herbivores.
C)  are bacteria.
D)  are fungi.
E)  All answers are correct.F) C) and D)
G) A) and E)

Question 16

Lichens and mosses that can grow on and erode rock would be considered pioneer species.

Accepted Answer

A) True 
 B)False

Question 17

Water covers about ______ percent of the Earth's surface.

Accepted Answer

A)  33
B)  40
C)  50
D)  70
E)  80F) C) and E)
G) B) and D)

Question 18

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the interaction between panic grass and its endophytic fungus allows them to grow at 65 ∘\circ∘ C together,but not independently.This is an example of

Accepted Answer

A)  mutualism.
B)  commensalism.
C)  parasitism.
D)  predation.
E)  competition. F) D) and E)
G) C) and D)

Question 19

On Earth,solar energy is most intense at

Accepted Answer

A)  the South Pole.
B)  the North Pole.
C)  60 degrees North latitude.
D)  the equator.
E)  60 degrees South latitudE.F) C) and D)
G) A) and C)

Question 20

A gradual change in a community's species composition,occurring as competing organisms respond to and modify the physical environment,is termed

Accepted Answer

A)  ecological completion.
B)  ecological conversion.
C)  ecological climax.
D)  ecological magnification.
E)  ecological succession.F) None of the above
G) B) and E)

Exam 19: Communities and Ecosystems

Water covers about ______ percent of the Earth's surface.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the interaction between panic grass and its endophytic fungus allows them to grow at 65 ∘\circ∘ C together,but not independently.This is an example of

Correct AnswerverifiedShow Answer

Walleye pike fish live in deep waters and feed at night.Another species of fish,the Northern pike,live in shallower waters and feed all day.Which of the following best explains these differences?

Correct AnswerverifiedShow Answer

The tilt of the Earth's axis produces distinct seasons in the northern and southern hemispheres as the Earth travels around the Sun.

Correct AnswerverifiedShow Answer

Lichens and mosses that can grow on and erode rock would be considered pioneer species.

Correct AnswerverifiedShow Answer

A ______ makes up a small portion of the community by weight,yet exerts a disproportionate influence on community diversity.

Correct AnswerverifiedShow Answer

On Earth,solar energy is most intense at

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

In a process called denitrification,bacteria convert ammonia to nitrites and eventually to nitrates.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is NOT a type of symbiosis?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the virus

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65 ∘\circ∘ C need to employ to avoid dehydration?

Correct AnswerverifiedShow Answer

The total of all the resources,both biotic and abiotic,that a species exploits for its survival,growth,and reproduction is its

Correct AnswerverifiedShow Answer

If you went diving in a freshwater lake,you would see very few rooted aquatic plants after a certain depth.What limits plant growth in deeper water?

Correct AnswerverifiedShow Answer

Secondary consumers

Correct AnswerverifiedShow Answer

Which of the following is NOT an important biogeochemical cycle on Earth?

Correct AnswerverifiedShow Answer

A food chain is a series of organisms that

Correct AnswerverifiedShow Answer

A gradual change in a community's species composition,occurring as competing organisms respond to and modify the physical environment,is termed

Correct AnswerverifiedShow Answer

The term "abiotic" means "nonliving."

Correct AnswerverifiedShow Answer

Correct Answer
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In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the interaction between panic grass and its endophytic fungus allows them to grow at 65^$\circ$C together,but not independently.This is an example of

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In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65^$\circ$C need to employ to avoid dehydration?

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