Question

Assertion: Homologous organs are similar in basic structure and embryonic origin, but serve different functions.

Reason: Similarity in basic structure points to common ancestry whereas diversity in function reflects adaptation to different modes of life.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

• A. Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
• B. Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.
• C. Assertion is True, Reason is False.
• D. Assertion is False, Reason is True.

Answer 1

The correct option is A

Assertion is True, Reason is True; Reason is a correct explanation for Assertion.

Correct option is (a).

Assertion Statement:

1. The human forelimb and wings of a bat perform different functions but have the same origin and skeletal system.
2. The human forelimb and wings of a bat are examples of homologous organs.
3. So the assertion statement is true.

Reason Statement:

1. The similarity in structure indicates the same origin, but their organ evolves to perform a different function to adapt to their environment.
2. Homologous organs are similar in basic structure and embryonic origin but serve different functions because they share a common ancestry, whereas diversity in function reflects adaptation to different modes of life.
3. So the reason statement is true.

Final Answer: Assertion is True, Reason is True; Reason is a correct explanation for Assertion.