Question 1

The first pioneer species to appear in an area undergoing secondary succession is

Accepted Answer

A)   an equilibrium species.
B)   long-lived.
C)   able to produce numerous offspring.
D)   a secondary consumer.
E)   slow to reach sexual maturity.F) A) and E)
G) C) and E)

Question 2

Among American warblers,several different species often live in the same spruce trees and eat caterpillars.However,each species reproduces at a slightly different time of year and each species also forage at different areas within the tree canopy.These differences in foraging behaviors and reproduction is an example of

Accepted Answer

A)   competitive exclusion.
B)   character displacement.
C)   resource partitioning.
D)   mutualism.
E)   competitive inclusion.F) A) and B)
G) C) and E)

Question 3

What is the first step in energy flow through an ecosystem?

Accepted Answer

A)   Producers absorb solar energy.
B)   Producers are eaten by the herbivores.
C)   Decomposers breakdown the organic matter and make it available for the producers.
D)   Top level carnivores eat the herbivores or omnivores within the ecosystem.
E)   Producers absorb nutrients from the soil.F) A) and B)
G) D) and E)

Question 4

All of the following are true about both primary and secondary succession EXCEPT

Accepted Answer

A)   both lead to a stable climax community.
B)   both include a progression of changes in the community over time.
C)   both occur in regions where soil is already present.
D)   for both communities, fungi and vascular seedless plants are typically the first species to colonize the area.
E)   both are colonized first by opportunistic species.F) A) and D)
G) A) and C)

Question 5

An ecosystem

Accepted Answer

A)   includes only the plants within a particular area.
B)   includes all the living organisms within a specific area, but not the abiotic factors.
C)   includes both living and abiotic factors within a particular region.
D)   always includes equal numbers of plant and animal species.
E)   only refers to biotic factors in a region.F) A) and B)
G) A) and E)

Question 6

Based on the figure shown here,which of the following is both a primary and secondary consumer?

Accepted Answer

A)   skunk
B)   mice
C)   rabbit
D)   deer
E)   snakeF) A) and E)
G) A) and B)

Question 7

Which of the following is a community?

Accepted Answer

A)   a group of walrus on a beach
B)   hummingbirds at a feeder
C)   trout and the lake they inhabit
D)   squirrels and the oak trees they live in
E)   a herd of elephants in the Namib desertF) A) and E)
G) C) and D) D

Question 8

Which of the following is an example of predation?

Accepted Answer

A)   daddy-long-legs, a type of arachnid that eat dead and decaying matter
B)   marine filter-feeders that have long tentacles to filter food particles from the water
C)   a starfish which is able to evert its stomach to break open and eat clams
D)   a giraffe pulling leaves off tall trees with its long tongue
E)   a tick that attaches to a deer and sucks its bloodF) A) and B)
G) B) and E)

Question 9

In an aquatic ecosystem,the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish,the crayfish are eaten by fish,and the fish are eaten by ducks.In this system,the greatest amount of biomass would be found in the

Accepted Answer

A)   aquatic plants.
B)   small invertebrates.
C)   crayfish.
D)   fish.
E)   ducks.F) C) and D)
G) All of the above

Question 10

Biomes are defined by

Accepted Answer

A)   types of plants.
B)   types of animals.
C)   communities.
D)   temperature and rainfall.
E)   both plants, animals, and inorganic matter. Temperature and rainfall account for the regional climate and different organisms are adapted to live in different climates.F) All of the above
G) B) and E)

Question 11

What is the source of carbon for most aquatic organisms?

Accepted Answer

A)   carbon dioxide
B)   calcium carbonate
C)   biocarbonate ions
D)   carbon monoxide
E)   fossil fuels Carbon dioxide in the air combines with water to produce biocarbonate.F) A) and B)
G) A) and C)

Question 12

A keystone species is

Accepted Answer

A)   the largest species in a community.
B)   the most numerous species in a community.
C)   the least numerous species in a community.
D)   a species on which many other species depend.
E)   the species that occupies most of the niches within a particular environment.F) None of the above
G) B) and E) D

Question 13

Which of the following is an example of a sedimentary cycle?

Accepted Answer

A)   the phosphorus cycle
B)   the nitrogen cycle
C)   the carbon cycle
D)   the atmospheric cycle
E)   eutrophic cycleF) B) and E)
G) A) and D) A

Question 14

All of the following are true about ecosystems EXCEPT

Accepted Answer

A)   chemicals are constantly recycled and reused.
B)   chemicals are converted from one form to another.
C)   energy is constantly recycled.
D)   energy is required continuously because some energy is lost.
E)   the ultimate source of energy is the sun.F) A) and B)
G) A) and C)

Question 15

An organism that obtains its food from the process of photosynthesis is a(n)

Accepted Answer

A)   autotroph.
B)   consumer.
C)   heterotroph.
D)   decomposer.
E)   omnivore.F) A) and E)
G) B) and E)

Question 16

The greenhouse effect

Accepted Answer

A)   will lead to decreased sea levels.
B)   decreases the amount of carbon dioxide in the air.
C)   increases the amount of carbon dioxide in the air.
D)   is caused by gases such as carbon dioxide trapping heat in the Earth's atmosphere.
E)   is due to gases forming a barrier around the Earth and insulating the Earth from the sun's rays. As carbon dioxide and other gases continue to increase in the atmosphere, these gases absorb and reradiate heat back to the Earth leading to a rise in overall temperature across the Earth.F) B) and D)
G) B) and C)

Question 17

Which of the following is an example of an ecosystem?

Accepted Answer

A)   zebras and the lions that prey on them
B)   a coral reef together with all the fishes and invertebrates living in and around it
C)   flowering plants and all the insects and birds that pollinate them
D)   male prairie chickens competing for access to mates
E)   rabbits eating carrotsF) A) and B)
G) B) and E)

Question 18

Which of the following boxes indicates the process of denitrification?

Accepted Answer

A)   Box A
B)   Box B
C)   Box C
D)   Box D
E)   Box E Denitrification converts nitrate to nitrogen gas.F) None of the above
G) A) and C)

Question 19

Which of the following is NOT true about species diversity?

Accepted Answer

A)   It includes species richness.
B)   It includes species diversity.
C)   It is influenced by the relative abundance of species.
D)   It is influenced by the distribution of the different species.
E)   It is not impacted by species richness.F) B) and D)
G) A) and D)

Question 20

A chemoautotroph obtains its energy from all of the following EXCEPT

Accepted Answer

A)   ammonia.
B)   oxygen.
C)   sulfides.
D)   nitrites.
E)   inorganic compounds.F) A) and B)
G) A) and C)

Exam 31: Communities and Ecosystems

The first pioneer species to appear in an area undergoing secondary succession is

Correct Answer
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What is the first step in energy flow through an ecosystem?

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All of the following are true about both primary and secondary succession EXCEPT

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An ecosystem

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Based on the figure shown here,which of the following is both a primary and secondary consumer?

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Which of the following is a community?

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D

Which of the following is an example of predation?

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In an aquatic ecosystem,the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish,the crayfish are eaten by fish,and the fish are eaten by ducks.In this system,the greatest amount of biomass would be found in the

Correct Answer
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Biomes are defined by

Correct Answer
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What is the source of carbon for most aquatic organisms?

Correct Answer
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A keystone species is

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D

Which of the following is an example of a sedimentary cycle?

Correct Answer
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A

All of the following are true about ecosystems EXCEPT

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An organism that obtains its food from the process of photosynthesis is a(n)

Correct Answer
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The greenhouse effect

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Which of the following is an example of an ecosystem?

Correct Answer
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Which of the following boxes indicates the process of denitrification?

Correct Answer
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Which of the following is NOT true about species diversity?

Correct Answer
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A chemoautotroph obtains its energy from all of the following EXCEPT

Correct Answer
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Exam 31: Communities and Ecosystems

The first pioneer species to appear in an area undergoing secondary succession is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the first step in energy flow through an ecosystem?

Correct AnswerverifiedShow Answer

All of the following are true about both primary and secondary succession EXCEPT

Correct AnswerverifiedShow Answer

An ecosystem

Correct AnswerverifiedShow Answer

Based on the figure shown here,which of the following is both a primary and secondary consumer?

Correct AnswerverifiedShow Answer

Which of the following is a community?

Correct AnswerverifiedD

Which of the following is an example of predation?

Correct AnswerverifiedShow Answer

In an aquatic ecosystem,the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish,the crayfish are eaten by fish,and the fish are eaten by ducks.In this system,the greatest amount of biomass would be found in the

Correct AnswerverifiedShow Answer

Biomes are defined by

Correct AnswerverifiedShow Answer

What is the source of carbon for most aquatic organisms?

Correct AnswerverifiedShow Answer

A keystone species is

Correct AnswerverifiedD

Which of the following is an example of a sedimentary cycle?

Correct AnswerverifiedA

All of the following are true about ecosystems EXCEPT

Correct AnswerverifiedShow Answer

An organism that obtains its food from the process of photosynthesis is a(n)

Correct AnswerverifiedShow Answer

The greenhouse effect

Correct AnswerverifiedShow Answer

Which of the following is an example of an ecosystem?

Correct AnswerverifiedShow Answer

Which of the following boxes indicates the process of denitrification?

Correct AnswerverifiedShow Answer

Which of the following is NOT true about species diversity?

Correct AnswerverifiedShow Answer

A chemoautotroph obtains its energy from all of the following EXCEPT

Correct AnswerverifiedShow Answer

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D

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D

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A

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