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easyMCQNEET 20222026Biology
1 mark

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 the vertebral column in the adult vertebrates.In the light of the above statements, choose the correct answer from the options given below:

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

Solution & Step-by-step Explanation

1. Assertion (A) is correct: All vertebrates possess chordate features (notochord, dorsal hollow nerve cord, etc.) at some stage, but not all chordates (like protochordates) develop a backbone.2. Reason (R) is correct: In the subphylum Vertebrata, the embryonic notochord is replaced by a cartilaginous or bony vertebral column in the adult.Since this replacement is exactly what defines a vertebrate within the chordates, (R) explains (A).

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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 the vertebral column in the adult vertebrates.In the light of the above statements, choose the correct answer from the options given below:
A
Both (A) and (R) are correct and (R) is the correct explanation of (A)
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
C
(A) is correct but (R) is not correct
D
(A) is not correct but (R) is correct

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