Cnidaria: Features & Classification — NEET Biology
📚 Practice ConceptThey are aquatic, mostly marine, sessile or free-swimming, radially symmetrical animals. The name cnidaria is derived from the
Assertion (A): All coelenterates are marine animals. Reason (R): Coelenterates are radially symmetrical animals with cnidoblasts.
View solution & NCERT explanation
Correct answer: D — If the assertion is false but the reason is true.
NCERT states “They are aquatic, mostly marine” - the qualifier “mostly” indicates exceptions like freshwater Hydra exist. The Assertion removes this qualifier making it false. The Reason is independently true from NCERT describing coelenterate characteristics, but the Assertion is false due to freshwater coelenterates.
What does NCERT say about They are aquatic mostly?
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.