Question

Assertion :

Embryonic development proves interrelationship and common ancestry of metazoans.

Reason: It involves similar sequence of five dynamic processes during development.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Embryonic development includes a definite series of phases which are fundamentally similar in all sexually reproducing organisms, and transform a one-celled zygote to a multicellular and fully formed developmental stage till hatching or birth such a remarkable similarity of embryonic development proves that all metazoans are interrelated and have common ancestry. Embryonic development involves five dynamic changes and identifiable processes these are - Gametogenesis, fertilization, cleavage, Gastrulation and organogenesis.

So the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.