Question

Assertion (A): The community of an ecotone commonly contains the organisms of each of the overlapping communities and in addition the organisms which are restricted to the ecotone.

Reason (R): The tendency for increased variety and density at community junctions is known as the edge effect.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

Explanation:

Both statements are true. The assertion describes which organisms may occur in an ecotone, while the reason defines edge effect; the definition does not explain the ecotone’s species composition.