Vertebrates vs Chordates Hierarchy — NEET Biology
📚 Practice Concept"All vertebrates are chordates but all chordates are not vertebrates". Justify the statement.
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates. Reason (R): Vertebrates represent a more advanced evolutionary group within the chordate phylum.
View solution & NCERT explanation
Correct answer: B — If both assertion and reason are true but reason is not the correct explanation of the assertion.
NCERT states “Thus all vertebrates are chordates but all chordates are not vertebrates” (Assertion true). The Reason is true - vertebrates are indeed more advanced with vertebral column replacing notochord. However, the Reason doesn’t explain WHY all chordates aren’t vertebrates - it doesn’t explain that some chordates (like Amphioxus) retain the notochord without developing vertebrae.
What does NCERT say about All vertebrates are chordates?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.