Question

Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.

Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.

In the light of the above statements, choose the correct answer from the options given below:

विकल्प

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is NOT the correct explanation of A.

• A is true but R is false.

• A is true but R is false.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

Since all vertebrates have a notochord at some point in their development, they are all chordates. But not all chordates, such as tunicates and cephalochordates, are vertebrates. The vertebral column, which is composed of bone or cartilage, replaces the notochord, which is present in vertebrates during the embryonic stage.