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(A) : Lichens cannot be the pioneer spec...

(A) : Lichens cannot be the pioneer species on a bare rock.
(R) : They are unable to tolerate desiccation and temperature.

A

If both (A) and (R) are true but (R) is not the correct explanation of (A).

B

If both (A) and (R) are true and (R) is the correct explanation of (A).

C

If (A) is true but (R) is false.

D

If both (A) and (R) are false.

Text Solution

Verified by Experts

The correct Answer is:
D
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