Both (A) and (R) are true and (R) is the correct explanation of (A). The members of subphylum vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Thus, all vertebrates are chordates but all chordates are not vertebrates.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : All vertebrates are…
NEET UG 2025 — Botany Animal Kingdom
2025mcqeasy
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:
Official previous-year question
Held on 30 Apr 2025 · Verified 9 Jul 2026.
Options
- A
Both (A) and (R) are true and (R) is the correct explanation of (A)
- B
Both (A) and (R) are true but (R) is not the correct explanation of (A)
- C
(A) is true but (R) is false
- D
(A) is false but (R) is true
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