AnswersPT-GSE Environmental Science B-ICLimiting Factors and Humans

Succession Answers

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Explain how human impact can lead to succession in ecosystems.

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2
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How are primary and secondary succession similar and how are they different?

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3

Which of the following statements about secondary succession is true?

A
Secondary succession occurs in ecosystems that have no vegetation.
B
Secondary succession affects ecosystems that are already established.
C
Ecosystems require pioneer species to undergo secondary succession.
D
Secondary succession can occur in areas without soil.
4

Succession is _______.

A
harmful to ecosystems
B
a natural recovery process
C
unnecessary for ecosystem recovery
D
a one-time event
5

What are some possible causes of succession in ecosystems?

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6

Succession occurs because _______.

A
organisms gradually change the environment
B
climax communities are not possible
C
dominant organisms drive out pioneer species
D
ecosystems never reach a sustainable point
7

Compare primitive communities to climax communities.

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8

Primary succession ________.

A
is caused solely by human events
B
occurs on preexisting soil
C
occurs in areas without soil
D
becomes normalized by climax species
9

Which of the following would you expect to find in a primitive community?

A
deer
B
trees
C
shrubs
D
algae
10

Explain how ecosystems are sustained through succession.

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