Phylum Arthropoda - Questions & Answers | Exam2Win

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326. Tentacles are branched and retractile in

A. Holothuria

B. Cucumaria

C. Echinus

D. All the above

Explanation:

327. Which one is absent in echinoderms

A. Nervous system

B. Muscular system

C. Cephalisation

D. All the above

Explanation:

328. Stone canal of Star Fish is

A. Straight

B. Rounded

C. Pentangular

D. S-shaped

Explanation:

329. In echinoderms, ossicles are

A. Exoskeletal plates

B. Endoskeletal plates

C. Regions of ambulacral grooves

D. Regions from where oral tentacles develop

Explanation:

330. Ophiura is

A. Brittle Star

B. Feather Star

C. Sand Dollar

D. Sea Lily

Explanation: