NEET Exam > NEET Questions > Given below are two statements: one is labell... Start Learning for Free
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.
Choose the correct answer from the options given below:
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.
Choose the correct answer from the options given below:
- a)(A) is True but (R) is False
- b)(A) is False but (R) is True
- c)Both (A) and (R) are True and (R) is the correct explanation of (A)
- d)Both (A) and (R) are True but (R) is not the correct explanation of (A)
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Given below are two statements: one is labelled as Assertion (A) and t...
Assertion (A) Explained
- The statement "All vertebrates are chordates but all chordates are not vertebrates" is True.
- Chordates are a broader phylum that includes all animals with a notochord, which is a flexible rod-like structure.
- Vertebrates are a subphylum of chordates characterized by having a backbone, but there are many chordates, like tunicates and lancelets, that do not have a backbone.
Reason (R) Explained
- The reason provided states that "the members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults," which is also True.
- During embryonic development, vertebrates do indeed have a notochord, which is later replaced by the vertebral column (spine) in most adult vertebrates.
- This characteristic is a significant distinction between vertebrates and non-vertebrate chordates.
Relationship Between (A) and (R)
- Reason (R) explains the developmental aspect of vertebrates, highlighting the presence of the notochord in embryonic stages and its transformation into the vertebral column.
- Thus, it provides an essential clarification for Assertion (A), confirming that while all vertebrates are indeed chordates, not all chordates develop into vertebrates.
Conclusion
- Since both the Assertion (A) and the Reason (R) are true, and (R) accurately explains (A), the correct answer is option 'C': Both (A) and (R) are True and (R) is the correct explanation of (A).
- The statement "All vertebrates are chordates but all chordates are not vertebrates" is True.
- Chordates are a broader phylum that includes all animals with a notochord, which is a flexible rod-like structure.
- Vertebrates are a subphylum of chordates characterized by having a backbone, but there are many chordates, like tunicates and lancelets, that do not have a backbone.
Reason (R) Explained
- The reason provided states that "the members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults," which is also True.
- During embryonic development, vertebrates do indeed have a notochord, which is later replaced by the vertebral column (spine) in most adult vertebrates.
- This characteristic is a significant distinction between vertebrates and non-vertebrate chordates.
Relationship Between (A) and (R)
- Reason (R) explains the developmental aspect of vertebrates, highlighting the presence of the notochord in embryonic stages and its transformation into the vertebral column.
- Thus, it provides an essential clarification for Assertion (A), confirming that while all vertebrates are indeed chordates, not all chordates develop into vertebrates.
Conclusion
- Since both the Assertion (A) and the Reason (R) are true, and (R) accurately explains (A), the correct answer is option 'C': Both (A) and (R) are True and (R) is the correct explanation of (A).
Free Test
FREE
| Start Free Test |
Community Answer
Given below are two statements: one is labelled as Assertion (A) and t...
- (i) Assertion: True. All vertebrates belong to phylum Chordata because they show chordate features (for example, a notochord) at some stage. However, several chordates (such as urochordates and cephalochordates) are not vertebrates.
- (ii) Reason: True. In members of subphylum Vertebrata, a notochord is present in the embryo and is largely replaced by a segmented vertebral column made of cartilage or bone in adults.
- (iii) Justification: The reason explains why vertebrates are a subset of chordates — the developmental replacement of the notochord by a vertebral column is a defining feature that distinguishes vertebrates from non-vertebrate chordates. Hence (c) is correct.
Therefore, the correct answer is: (c) . Both (A) and (R) are True and (R) is the correct explanation of (A).
 | Explore Courses for NEET exam |  |
Top Courses for NEETView all
Top Courses for NEET
Question Description
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? for NEET 2026 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). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2026 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). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer?.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? for NEET 2026 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). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2026 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). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer?.
Solutions for Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [NEET 2025]Assertion (A):All vertebrates are chordates but all chordates are not vertebrates.Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.Choose the correct answer from the options given below:a)(A) is True but (R) is Falseb)(A) is False but (R) is Truec)Both (A) and (R) are True and (R) is the correct explanation of (A)d)Both (A) and (R) are True but (R) is not the correct explanation of (A)Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice NEET tests.
| Explore Courses for NEET exam | |
Top Courses for NEET
Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
