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Animal Kingdom question

2025 · Q12
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Animal Kingdom question

2025 · Q12

NEETBiologyAnimal KingdomMCQ+4 / −1

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 vertebrate.

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

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

  1. A
    (A) is true but (R) is false
  2. B
    (A) is false but (R) is true
  3. C
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  4. D
    Both (A) and (R) are true but (R) is not the correct explanation of (A)
View written solutionFree

Correct answer: C

Both the assertion and the reason are correct, and the reason provides an accurate explanation for the assertion.

Members of the subphylum Vertebrata possess a notochord during their embryonic stage. This notochord is later replaced by a cartilaginous or bony vertebral column in the adult stage, distinguishing vertebrates within the chordates. Hence, while all vertebrates fall under the category of chordates due to the presence of a notochord, not all chordates develop into vertebrates, as some retain the notochord throughout their life.

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