Question 1

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) None of the above

Question 2

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

Question 3

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) None of the above
G) B) and E)

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Question 10

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

Accepted Answer

A) True 
 B)False  True

Question 11

The major types of ecosystems are termed

Accepted Answer

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

Question 12

-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) C) and D)
G) None of the above

Question 13

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) C) and D)

Question 14

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) A) and E) A

Question 15

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 D)
G) C) and D)

Question 16

A network of interconnected food chains is a food web.

Accepted Answer

A) True 
 B)False

Question 17

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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Question 20

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

Exam 19: Communities and Ecosystems

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which two parameters most influence the location of biomes?

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of eutrophication?

Correct AnswerverifiedShow Answer

Abiotic components of an ecosystem include

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedTrue

The major types of ecosystems are termed

Correct AnswerverifiedShow Answer

-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

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

Correct AnswerverifiedShow Answer

Coral obtains energy

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

A network of interconnected food chains is a food web.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedC

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True

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A

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