Question 1

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

Accepted Answer

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

Question 2

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

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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) None of the above
F) B) and C)

Question 5

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

Question 6

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 E)
G) All of the above

Question 7

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) None of the above
G) A) and D)

Question 8

Secondary consumers

Accepted Answer

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

Question 9

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) A) and B)
G) All of the above

Question 10

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) C) and E)

Question 11

The term "abiotic" means "nonliving."

Accepted Answer

A) True 
 B)False

Question 12

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) A) and E)
G) A) and D)

Question 13

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

Question 14

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 B)
G) A) and E)

Question 15

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

Question 16

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) B) and E)
G) A) and D)

Question 17

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

Question 18

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 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Exam 19: Communities and Ecosystems

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

On Earth,solar energy is most intense at

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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

Correct AnswerverifiedShow Answer

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

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

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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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The term "abiotic" means "nonliving."

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Secondary consumers

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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

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

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

Which of the following is NOT a type of symbiosis?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A food chain is a series of organisms that

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

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 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

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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

Correct Answer
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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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