Question 1

As temperatures in the Arctic rise,which of the following changes may occur?

Accepted Answer

A)  Tundra will be replaced by taiga. 
B)  Taiga will be replaced by tundra. 
C)  Temperate forest will be replaced by taiga. 
D)  Tundra will be replaced by desert. 
E)  Taiga will be replaced by temperate rain forest. 
A)  Tundra will be replaced by taiga. 
B)  Taiga will be replaced by tundra. 
C)  Temperate forest will be replaced by taiga. 
D)  Tundra will be replaced by desert. 
E)  Taiga will be replaced by temperate rain forest.

Question 2

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

Question 3

The physical place where members of a population live is termed a

Accepted Answer

A)  competitive zone. 
B)  community. 
C)  habitat. 
D)  symbiont. 
E)  niche. 
A)  competitive zone. 
B)  community. 
C)  habitat. 
D)  symbiont. 
E)  niche.

Question 4

If asked to put an arrow in a diagram showing energy flow through an ecosystem,you would use a single-headed arrow.

Accepted Answer

A) True 
 B)False

Question 5

In the pyramid of energy,organisms that obtain their energy from only eating primary producers are called

Accepted Answer

A)  secondary producers. 
B)  tertiary consumers. 
C)  secondary consumers. 
D)  tertiary producers. 
E)  primary consumers. 
A)  secondary producers. 
B)  tertiary consumers. 
C)  secondary consumers. 
D)  tertiary producers. 
E)  primary consumers.

Question 6

You observe a situation in which a worm and a species of mustard grow better when both are present in an ecosystem,helping one another exploit resources.You are observing

Accepted Answer

A)  predation. 
B)  parasitism. 
C)  mutualism. 
D)  commensalism. 
E)  intraspecific competition. 
A)  predation. 
B)  parasitism. 
C)  mutualism. 
D)  commensalism. 
E)  intraspecific competition.

Question 7

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

Accepted Answer

A)  habitat 
B)  niche 
C)  climax level 
D)  trophic level 
E)  keystone level 
A)  habitat 
B)  niche 
C)  climax level 
D)  trophic level 
E)  keystone level

Question 8

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 9

Which of the following is not a characteristic of the tropical rain forest biome?

Accepted Answer

A)  warm climate 
B)  nutrient-rich soil 
C)  a year-round growing season for plants 
D)  a tremendous diversity of animal life 
E)  a location near the equator 
A)  warm climate 
B)  nutrient-rich soil 
C)  a year-round growing season for plants 
D)  a tremendous diversity of animal life 
E)  a location near the equator

Question 10

Along coastlines,the area between high tide and low tide is the

Accepted Answer

A)  open ocean. 
B)  hydrothermal vent. 
C)  intertidal zone. 
D)  estuary. 
E)  continental shelf. 
A)  open ocean. 
B)  hydrothermal vent. 
C)  intertidal zone. 
D)  estuary. 
E)  continental shelf.

Question 11

A grassland biome

Accepted Answer

A)  consists of mostly coniferous trees. 
B)  has nutrient-rich soil. 
C)  has many self-pollinating flowering plants. 
D)  is warm and dry. 
E)  consists of mosses and lichens. 
A)  consists of mostly coniferous trees. 
B)  has nutrient-rich soil. 
C)  has many self-pollinating flowering plants. 
D)  is warm and dry. 
E)  consists of mosses and lichens.

Question 12

Energy can be depleted within an ecosystem.

Accepted Answer

A) True 
 B)False

Question 13

As an overall average,about ________ of the energy at one trophic level is generally available to the next highest rank in the food chain.

Accepted Answer

A)  2% 
B)  10% 
C)  4% 
D)  7% 
E)  20% 
A)  2% 
B)  10% 
C)  4% 
D)  7% 
E)  20%

Question 14

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.
-If global temperatures increase,which biome will the Boundary Waters Canoe Area (BWCA)turn into?

Accepted Answer

A)  tropical rainforest 
B)  deciduous forest 
C)  boreal forest 
D)  short grass prairie 
E)  tundra 
A)  tropical rainforest 
B)  deciduous forest 
C)  boreal forest 
D)  short grass prairie 
E)  tundra

Question 15

In this system,the zooplankton are the

Accepted Answer

A)  tertiary consumers. 
B)  secondary consumers. 
C)  producers. 
D)  decomposers. 
E)  primary consumers. 
A)  tertiary consumers. 
B)  secondary consumers. 
C)  producers. 
D)  decomposers. 
E)  primary consumers.

Question 16

At the equator,the Earth receives the

Accepted Answer

A)  maximum amount of solar radiation per unit area. 
B)  minimum amount of solar radiation per unit area. 
C)  maximum amount of solar radiation only over the ocean. 
D)  maximum amount of solar radiation only over the land mass. 
E)  None of the answer choices are correct. 
A)  maximum amount of solar radiation per unit area. 
B)  minimum amount of solar radiation per unit area. 
C)  maximum amount of solar radiation only over the ocean. 
D)  maximum amount of solar radiation only over the land mass. 
E)  None of the answer choices are correct.

Question 17

The type of succession that occurs in an area where no community previously existed is ________ succession.

Accepted Answer

A)  keystone 
B)  tertiary 
C)  secondary 
D)  climax 
E)  primary 
A)  keystone 
B)  tertiary 
C)  secondary 
D)  climax 
E)  primary

Question 18

When a tapeworm steals nutrients from the gut of a mammalian host,that symbiosis is called

Accepted Answer

A)  predation. 
B)  mutualism. 
C)  commensalism. 
D)  parasitism. 
E)  intraspecific competition. 
A)  predation. 
B)  mutualism. 
C)  commensalism. 
D)  parasitism. 
E)  intraspecific competition.

Question 19

________ bacteria return nitrogen to the atmosphere by converting nitrates to N₂.

Accepted Answer

A)  Nitrogen-fixing 
B)  In nitrification, 
C)  In denitrification, 
D)  In transpiration, 
E)  In respiration, 
A)  Nitrogen-fixing 
B)  In nitrification, 
C)  In denitrification, 
D)  In transpiration, 
E)  In respiration,

Question 20

A type of symbiosis in which one member of the relationship benefits with no effect on the other is

Accepted Answer

A)  predation. 
B)  mutualism. 
C)  commensalism. 
D)  parasitism. 
E)  intraspecific competition. 
A)  predation. 
B)  mutualism. 
C)  commensalism. 
D)  parasitism. 
E)  intraspecific competition.

Exam 19: Communities and Ecosystems

As temperatures in the Arctic rise,which of the following changes may occur?

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

The physical place where members of a population live is termed a

If asked to put an arrow in a diagram showing energy flow through an ecosystem,you would use a single-headed arrow.

In the pyramid of energy,organisms that obtain their energy from only eating primary producers are called

You observe a situation in which a worm and a species of mustard grow better when both are present in an ecosystem,helping one another exploit resources.You are observing

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

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.

Which of the following is not a characteristic of the tropical rain forest biome?

Along coastlines,the area between high tide and low tide is the

A grassland biome

Energy can be depleted within an ecosystem.

As an overall average,about ________ of the energy at one trophic level is generally available to the next highest rank in the food chain.

In this system,the zooplankton are the

At the equator,the Earth receives the

The type of succession that occurs in an area where no community previously existed is ________ succession.

When a tapeworm steals nutrients from the gut of a mammalian host,that symbiosis is called

________ bacteria return nitrogen to the atmosphere by converting nitrates to N₂.

A type of symbiosis in which one member of the relationship benefits with no effect on the other is

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