Question

Assertion : Coelenterates and flatworms show morphollaxis regeneration.
Reason : In both of these, a body fragment can develop into complete organism.

• A. Both Assertion and Reason are true and Reason is a correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Both Assertion and Reason are false
• E. Assertion is false but reason is true

Answer 1

The correct option is A Both Assertion and Reason are true and Reason is a correct explanation of Assertion

Hydra (Coelenterata) is cut transversely into two or more parts. Then they can grow into a complete organism of smaller size and Planaria (flatworms) can also develop into a complete animal though of smaller size than the parental animal by morphallactic regeneration as in Hydra. In morphallaxis, any cut part of the organism regenerates into a whole organism.

So the correct answer is option A.