Mollusca & Echinodermata — NEET Biology MCQs with Solutions
Free NEET Biology Mollusca & Echinodermata 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 — Mollusca & Echinodermata · easy · theory
The rasping feeding organ found in the mouth of most molluscs is the:
A. Radula ✓ Correct
B. Nephridium
C. Madreporite
D. Osculum
Solution: The radula is a file-like rasping ribbon used in feeding by most molluscs.
Q2 — Mollusca & Echinodermata · easy · theory
Echinoderms possess a unique ______ used in locomotion, feeding and respiration:
A. Notochord
B. Malpighian tubule
C. Water vascular system (with tube feet) ✓ Correct
D. Radula
Solution: The water (ambulacral) vascular system with tube feet is exclusive to echinoderms.
Q3 — Mollusca & Echinodermata · medium · theory
Adult echinoderms show ______ symmetry, whereas their larvae show ______ symmetry:
A. Radial; bilateral ✓ Correct
B. Both radial
C. Asymmetry; radial
D. Bilateral; radial
Solution: Adult echinoderms are radially symmetrical, but their larvae are bilaterally symmetrical — evidence of bilaterian ancestry.
Q4 — Mollusca & Echinodermata · medium · theory
The soft body of molluscs is typically covered by a ______ secreted by the ______:
A. Cuticle; mesoderm
B. Calcareous shell; mantle ✓ Correct
C. Test; madreporite
D. Chitinous exoskeleton; epidermis
Solution: The mantle secretes the calcareous shell; the visceral hump lies within it.
Q5 — Mollusca & Echinodermata · hard · theory
Echinoderms are placed close to chordates in evolution because they are:
A. Acoelomate
B. Protostomes with a radula
C. Deuterostomes (blastopore forms the anus), like chordates ✓ Correct
D. Diploblastic
Solution: Echinoderms and chordates are deuterostomes (enterocoelous coelom), indicating a shared lineage distinct from protostomes (annelids/arthropods/molluscs).
Q6 — Mollusca & Echinodermata · hard · theory
Which pairing of animal and phylum is CORRECT?
A. Antedon — Mollusca
B. Octopus — Echinodermata
C. Sepia — Echinodermata
D. Pila (Apple snail) — Mollusca; Asterias (star fish) — Echinodermata ✓ Correct
Solution: Pila, Octopus, Sepia are molluscs; Asterias, Antedon (feather star), Echinus are echinoderms.