Coelenterata & Ctenophora — NEET Biology MCQs with Solutions
Free NEET Biology Coelenterata & Ctenophora MCQs with step-by-step solutions (6 questions). Part of Animal Kingdom. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Coelenterata & Ctenophora · easy · theory
The stinging cells (cnidoblasts) used for defence and capture of prey are characteristic of:
A. Ctenophora
B. Platyhelminthes
C. Coelenterata (Cnidaria) ✓ Correct
D. Porifera
Solution: Cnidoblasts/cnidocytes bearing nematocysts on the tentacles define the Cnidaria.
Q2 — Coelenterata & Ctenophora · easy · theory
Ctenophores move using eight external rows of:
A. Setae
B. Parapodia
C. Tube feet
D. Ciliary comb plates ✓ Correct
Solution: Ctenophores (sea walnuts/comb jellies) swim by beating eight rows of ciliated comb plates.
Q3 — Coelenterata & Ctenophora · medium · theory
The two body forms — a sessile polyp and a free-swimming medusa — occurring in the life cycle of some cnidarians is called:
A. Metamerism
B. Metagenesis (alternation of generations) ✓ Correct
C. Metamorphosis
D. Regeneration
Solution: Metagenesis: the polyp produces medusae asexually and medusae produce polyps sexually (e.g. Obelia).
Q4 — Coelenterata & Ctenophora · medium · theory
Both cnidarians and ctenophores share which grade and symmetry?
A. Coelomate, organ-system level
B. Diploblastic, tissue level, radial symmetry ✓ Correct
C. Triploblastic, organ level, bilateral
D. Acoelomate, cellular level
Solution: Both are diploblastic with tissue-level organisation and radial symmetry.
Q5 — Coelenterata & Ctenophora · hard · theory
Bioluminescence (light emission) is a well-marked feature of:
A. Flatworms
B. Sponges
C. Ctenophores (e.g. Pleurobrachia, Ctenoplana) ✓ Correct
D. All cnidarians
Solution: Ctenophores are noted for bioluminescence; they lack cnidoblasts (a key difference from Cnidaria).
Q6 — Coelenterata & Ctenophora · hard · theory
Which cnidarian example correctly matches its predominant body form?
A. Physalia — polyp only
B. Meandrina — medusa
C. Adamsia (sea anemone) — polyp; Aurelia (jelly fish) — medusa ✓ Correct
D. Hydra — medusa only
Solution: Sea anemones/corals are polypoid; jelly fish are medusoid; colonial forms (Physalia) show both.