Question 1

Based on the 10% rule,if there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a primary consumer?

Accepted Answer

A)   100 calories
B)   10,000 calories
C)   10 calories
D)   1,000 calories
E)   1 calorieF) A) and D)
G) A) and C)

Question 2

Abiotic components of an ecosystem include

Accepted Answer

A)   living components only.
B)   both nonliving and living components.
C)   only plant life.
D)   nonliving components only.
E)   only animal life.F) B) and D)
G) D) and E)

Question 3

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

Accepted Answer

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

Question 4

The major types of ecosystems are termed

Accepted Answer

A)   habitats.
B)   niches.
C)   biospheres.
D)   terrestrial zones.
E)   biomes.F) A) and B)
G) C) and E)

Question 5

Coral obtains energy

Accepted Answer

A)   by capturing and digesting small animals and through symbiosis with photosynthetic algae.
B)   by capturing and digesting small animals.
C)   through symbiosis with photosynthetic algae.
D)   by performing photosynthesis.
E)   by performing photosynthesis and capturing and digesting small animals.F) A) and C)
G) All of the above A

Question 6

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange,the bacteria obtain food from the plants.Which type of interaction is this?

Accepted Answer

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

Question 7

Which item helps compose a living thing rather then being a major component of soil?

Accepted Answer

A)   rock fragments
B)   organic matter
C)   microbes
D)   bacteria
E)   chloroplastsF) A) and E)
G) None of the above

Question 8

Which two parameters most influence the location of biomes?

Accepted Answer

A)   altitude and latitude
B)   latitude and temperature
C)   temperature and precipitation
D)   precipitation and altitude
E)   precipitation and latitudeF) A) and B)
G) A) and C)

Question 9

When two or more species vie for the same limited resource,________ occurs.

Accepted Answer

A)   succession
B)   symbiosis
C)   coevolution
D)   stotting
E)   competitionF) A) and B)
G) A) and C)

Question 10

In this system,mercury released from coal-burning power plants would be at the highest concentration in

Accepted Answer

A)   the phytoplankton.
B)   the zooplankton.
C)   the minnows.
D)   the walleye pike fish.
E)   The amount of mercury would be the same in all organisms.F) All of the above
G) A) and E)

Question 11

As temperatures in an African savanna increase and rainfall decreases,it would most likely change into

Accepted Answer

A)   taiga.
B)   desert.
C)   tropical rainforest.
D)   temperate forest.
E)   tundra.F) All of the above
G) D) and E)

Question 12

A flowering plant and a bird which occasionally perches on its branches are not likely to coevolve.

Accepted Answer

A) True 
 B)False

Question 13

A network of interconnected food chains is a food web.

Accepted Answer

A) True 
 B)False

Question 14

All the organisms plus the nonliving components of a defined area is a(n)

Accepted Answer

A)   population.
B)   community.
C)   ecosystem.
D)   habitat.
E)   niche.F) All of the above
G) B) and E) C

Question 15

-Within convection cells,warm moist air rises from the equator and descends at 20-30 degrees from the equator.Convection cells are partially responsible for the distribution of which two biomes?

Accepted Answer

A)   tropical rain forests and temperate grasslands
B)   boreal forests and subtropical deserts
C)   tropical rain forests and subtropical deserts
D)   tropical rain forests and arctic tundra
E)   boreal forests and temperate forestsF) A) and D)
G) A) and C)

Question 16

Species evenness is an important measure of diversity in an ecosystem.

Accepted Answer

A) True 
 B)False  True

Question 17

What is a challenge that organisms living in an intertidal zone face that other aquatic organisms normally do not face?

Accepted Answer

A)   damage from pollution
B)   changes in temperature at different depths
C)   movement of water
D)   light penetrating only through the photic zone
E)   daily changes in water depthF) B) and C)
G) A) and B)

Question 18

Species richness is an important measure of diversity in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is not a characteristic of eutrophication?

Accepted Answer

A)   It is caused by sewage entering into waterways.
B)   It is caused by fertilizers entering into waterways
C)   It can result in massive fish kills.
D)   It can result in algae blooms.
E)   All of the answer choices are characteristics of eutrophication.F) B) and E)
G) None of the above

Question 20

You go to the Boundary Waters Canoe Area (BWCA)  in Northern Minnesota. This ecosystem contains mostly coniferous and a few deciduous trees. It has mild winters and cool summers. It also receives plenty of rainfall.
-The Boundary Waters Canoe Area (BWCA) is an example of which biome?

Accepted Answer

A)   temperate coniferous forest
B)   tropical rainforest
C)   short grass prairie
D)   tundra
E)   temperate rainforestF) A) and E)
G) A) and B)

Exam 19: Communities and Ecosystems

Based on the 10% rule,if there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a primary consumer?

Correct AnswerverifiedShow Answer

Abiotic components of an ecosystem include

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The major types of ecosystems are termed

Correct AnswerverifiedShow Answer

Coral obtains energy

Correct AnswerverifiedA

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange,the bacteria obtain food from the plants.Which type of interaction is this?

Correct AnswerverifiedShow Answer

Which item helps compose a living thing rather then being a major component of soil?

Correct AnswerverifiedShow Answer

Which two parameters most influence the location of biomes?

Correct AnswerverifiedShow Answer

When two or more species vie for the same limited resource,________ occurs.

Correct AnswerverifiedShow Answer

In this system,mercury released from coal-burning power plants would be at the highest concentration in

Correct AnswerverifiedShow Answer

As temperatures in an African savanna increase and rainfall decreases,it would most likely change into

Correct AnswerverifiedShow Answer

A flowering plant and a bird which occasionally perches on its branches are not likely to coevolve.

Correct AnswerverifiedShow Answer

A network of interconnected food chains is a food web.

Correct AnswerverifiedShow Answer

All the organisms plus the nonliving components of a defined area is a(n)

Correct AnswerverifiedC

-Within convection cells,warm moist air rises from the equator and descends at 20-30 degrees from the equator.Convection cells are partially responsible for the distribution of which two biomes?

Correct AnswerverifiedShow Answer

Species evenness is an important measure of diversity in an ecosystem.

Correct AnswerverifiedTrue

What is a challenge that organisms living in an intertidal zone face that other aquatic organisms normally do not face?

Correct AnswerverifiedShow Answer

Species richness is an important measure of diversity in an ecosystem.

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of eutrophication?

Correct AnswerverifiedShow Answer

You go to the Boundary Waters Canoe Area (BWCA) in Northern Minnesota. This ecosystem contains mostly coniferous and a few deciduous trees. It has mild winters and cool summers. It also receives plenty of rainfall. -The Boundary Waters Canoe Area (BWCA) is an example of which biome?

Correct AnswerverifiedShow Answer

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A

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C

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True

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