Unit Test — Unit test Answers

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Why are lichens a good pioneer species after a volcanic eruption?

A
They are able to grow on moist soil.
B
They are able to grow on bare rock.
C
They are able to attract animals.
D
They are able to grow without water.
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Which best describes a possible negative impact of irrigation of farmland?

A
Food can be produced in dry areas.
B
Increased runoff can pollute bodies of water.
C
Food can be produced through drought years.
D
Water can improve the livelihood of farmers.

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