NEET Previous Year Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): Notochord is replaced by vertebral column in the adult vertebratesIn the light of the above statements, choose the correct answer from the options given below.

Topic: NEET PYQ

Answer: B. Full step-by-step solution below.

  1. A
  2. BBoth (A) and (R) are correct and (R) is the correct explanation of
  3. CBoth (A) and (R) are correct but (R) is not the correct explanation of
  4. D

Correct answer: B

Solution

(b) The members of Vertebrata possess notochord during embryonic development. Therefore, all vertebrates are chordates. However, the notochord gets replaced by a cartilaginous or bony vertebral column in the adult. Therefore, all chordates are not vertebrates.

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