Question 1

You go on a canoe trip to the Boundary Waters Canoe Area (BWCA)  in northern Minnesota. This ecosystem is cold most of the year and receives plenty of rainfall. It has many lakes that are full of walleye pike. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) , which eat algae (phytoplankton) .
-Mercury released from coal burning power plants would be at the highest concentration in

Accepted Answer

A)   the walleye.
B)   the zooplankton.
C)   the minnows.
D)   the phytoplankton.
E)   eagles that eat the walleye.F) C) and E)
G) A) and E)

Question 2

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a secondary consumer?

Accepted Answer

A)   1 calorie
B)   10,000 calories
C)   100 calories
D)   10 calories
E)   1000 caloriesF) A) and E)
G) C) and D)

Question 3

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

Accepted Answer

A) True 
 B)False

Question 4

How was the virus detected?

Accepted Answer

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

Question 5

A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time.This is an example of _____.

Accepted Answer

A)   species evenness
B)   competitive exclusion
C)   commensalism
D)   an apparent climax community
E)   successionF) A) and C)
G) A) and D)

Question 6

Secondary consumers are

Accepted Answer

A)   herbivores.
B)   bacteria.
C)   All of the answer choices are correct.
D)   fungi.
E)   carnivores.F) A) and E)
G) None of the above

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

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

Question 9

A species that is so important to its community (such as the sea otter) that their removal can dismantle a food web is termed a _____ species.

Accepted Answer

A)   capstone
B)   cornerstone
C)   cobblestone
D)   flagstone
E)   keystoneF) A) and B)
G) A) and D)

Question 10

You go on a canoe trip to the Boundary Waters Canoe Area (BWCA)  in northern Minnesota. This ecosystem is cold most of the year and receives plenty of rainfall. It has many lakes that are full of walleye pike. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) , which eat algae (phytoplankton) .
-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 explains these differences?

Accepted Answer

A)   mutualism
B)   predation
C)   parasitism
D)   commensalism
E)   competitionF) D) and E)
G) B) and D)

Question 11

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

Accepted Answer

A)   trophic level
B)   habitat
C)   keystone level
D)   niche
E)   climax levelF) All of the above
G) A) and D)

Question 12

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)   nitrogen gas (N2)  to ammonium (NH4) 
C)   nitrate (NO3)  to nitrogen gas (N2) 
D)   nitrate (NO3)  to ammonium (NH4) 
E)   ammonium (NH4)  to nitrate (NO3) F) C) and D)
G) C) and E)

Question 13

You go on a canoe trip to the Boundary Waters Canoe Area (BWCA)  in northern Minnesota. This ecosystem is cold most of the year and receives plenty of rainfall. It has many lakes that are full of walleye pike. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) , which eat algae (phytoplankton) .
-Zooplankton are which of the following?

Accepted Answer

A)   secondary consumers
B)   tertiary consumers
C)   producers
D)   decomposers
E)   primary consumersF) All of the above
G) C) and D)

Question 14

A genetic change in one species that selects for a subsequent change in a different species is termed

Accepted Answer

A)   evolutionary dynamics.
B)   competitive exclusion.
C)   coevolution.
D)   genetic dispersion.
E)   gene dynamics.F) B) and C)
G) A) and E)

Question 15

The ecosystem that would most likely have a very high net primary productivity is a

Accepted Answer

A)   boreal forest.
B)   desert.
C)   temperate forest.
D)   tundra.
E)   tropical rain forest.F) A) and E)
G) A) and B)

Exam 38: 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 changing environment.

Correct Answer
verified

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

Correct Answer
verified

How was the virus detected?

Correct Answer
verified

Secondary consumers are

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

A genetic change in one species that selects for a subsequent change in a different species is termed

Correct Answer
verified

A species that is so important to its community (such as the sea otter) that their removal can dismantle a food web is termed a _____ species.

Correct Answer
verified

Correct Answer
verified

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a secondary consumer?

Correct Answer
verified

The ecosystem that would most likely have a very high net primary productivity is a

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time.This is an example of _____.

Correct Answer
verified

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

Correct Answer
verified

Exam 38: 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 changing environment.

Correct AnswerverifiedShow Answer

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

Correct AnswerverifiedShow Answer

How was the virus detected?

Correct AnswerverifiedShow Answer

Secondary consumers are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A genetic change in one species that selects for a subsequent change in a different species is termed

Correct AnswerverifiedShow Answer

A species that is so important to its community (such as the sea otter) that their removal can dismantle a food web is termed a _____ species.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a secondary consumer?

Correct AnswerverifiedShow Answer

The ecosystem that would most likely have a very high net primary productivity is a

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 AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time.This is an example of _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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verified

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