Question

Which of the following are true statements regarding lichens?

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

Answer 1

Answer: (A), (C)

The correct options are
A They help in the formation of soil.
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.