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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 vertebral column in the adult vertebrates.
In the light of the above statements, choose the most appropriate answer from the option given below :
  • a)
    (A) is not correct but (R) is correct
  • b)
    Both (A) and (R) are correct and (R) is the correct explanation of (A)
  • c)
    Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  • d)
    (A) is correct but (R) is not correct
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Given below are two statements : one is labelled as Assertion (A) and...
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): Notochord is replaced by vertebral column in adult vertebrates.

The given assertion and reason are both correct, and the reason is the correct explanation of the assertion.

Explanation:
Chordates: Chordates are a group of animals that possess a notochord at some stage of their life cycle. The notochord is a flexible, rod-like structure that provides support to the body. Chordates also have a dorsal hollow nerve cord and pharyngeal slits or pouches.

Vertebrates: Vertebrates are a subcategory of chordates that have a vertebral column or backbone. The vertebral column replaces the notochord during development and provides structural support and protection for the spinal cord.

Explanation of the Assertion (A): The assertion states that all vertebrates are chordates but all chordates are not vertebrates. This is true because vertebrates are a specific subgroup of chordates that possess a vertebral column. All vertebrates have a notochord at some stage of their life cycle, but it is subsequently replaced by the vertebral column in adult vertebrates.

Explanation of the Reason (R): The reason provided in the statement is that the notochord is replaced by the vertebral column in adult vertebrates. This is also true. During embryonic development, the notochord forms as a temporary structure and provides support to the developing embryo. As the embryo matures into an adult vertebrate, the notochord is gradually replaced by the vertebral column, which becomes the main structural element of the organism.

Conclusion: Both the assertion and reason are correct, and the reason is a correct explanation of the assertion. Therefore, the correct answer is option (b) - Both (A) and (R) are correct, and (R) is the correct explanation of (A).
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Community Answer
Given below are two statements : one is labelled as Assertion (A) and...
. Option (2) is the correct answer because all chordates are divided into three subphyla – Urochordata, Cephalochordata and Vertebrata. In subphylum Vertebrata, notochord is replaced by bony or cartilaginous vertebral column in adults. Therefore, all vertebrates are chordates but all chordates are not vertebrates.
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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 vertebral column in the adult vertebrates.In the light of the above statements, choose the most appropriate answer from the option given below :a)(A) is not correct but (R) is correctb)Both (A) and (R) are correct and (R) is the correct explanation of (A)c)Both (A) and (R) are correct but (R) is not the correct explanation of (A)d)(A) is correct but (R) is not correctCorrect answer is option 'B'. Can you explain this answer?
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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 vertebral column in the adult vertebrates.In the light of the above statements, choose the most appropriate answer from the option given below :a)(A) is not correct but (R) is correctb)Both (A) and (R) are correct and (R) is the correct explanation of (A)c)Both (A) and (R) are correct but (R) is not the correct explanation of (A)d)(A) is correct but (R) is not correctCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about 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 vertebrates.In the light of the above statements, choose the most appropriate answer from the option given below :a)(A) is not correct but (R) is correctb)Both (A) and (R) are correct and (R) is the correct explanation of (A)c)Both (A) and (R) are correct but (R) is not the correct explanation of (A)d)(A) is correct but (R) is not correctCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 vertebrates.In the light of the above statements, choose the most appropriate answer from the option given below :a)(A) is not correct but (R) is correctb)Both (A) and (R) are correct and (R) is the correct explanation of (A)c)Both (A) and (R) are correct but (R) is not the correct explanation of (A)d)(A) is correct but (R) is not correctCorrect answer is option 'B'. Can you explain this answer?.
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