Coelenterata Ctenophora - Questions & Answers | Exam2Win

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316. The body of Hydra contracts with the help of

A. Epitheliomuscular cells

B. Endotheliomuscular cells

C. Sensory cells

D. Glandulo-muscular cells

Explanation:

317. In Physalia, nematoblasts paralyse the prey by

A. Haemotoxin

B. Neurotoxin

C. Myotoxin

D. Both B and C

Explanation:

318. Nerve cells of coelenterates is

A. Apolar

B. Unipolar

C. Bipolar

D. Multipolar

Explanation:

319. Aurelia has

A. Two smooth oral arms

B. Two nematoblast rich oral arms

C. Four tentacles

D. Four cnidoblast rich oral arms

Explanation:

320. Crest or sail of float in Physalia is differently coloured. It is

A. Yellow

B. Crimson

C. Violet

D. Black

Explanation: