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Question

Which of the following are true statements regarding lichens?

A
They help in the formation of soil.
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B
They are dead and decayed organisms.
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C
They can be found on the surface of rocks.
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D
They degrade the fertility of soil.
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Solution

The correct option is C They can be found on the surface of rocks.
Lichens grow on the surface of rocks. They release certain substances that cause the rock surface to powder down and form a thin layer of soil. They also enrich the soil by trapping water, dust and silt.

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