Phylum Arthropoda - Questions & Answers | Exam2Win

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216. Mollusca is differentiated from others by

A. Bilateral symmetry and external skeleton

B. Mantle and gill

C. Shell and nonsegmented body

D. Mantle and nonsegmented body

Explanation:

217. Which of the following is not a class of Mollusca?

A. Decapoda

B. Gastropoda

C. Scaphopoda

D. Cephalopoda

Explanation:

218. Asymmetry develops due to torsion in mollusc

A. Octopus

B. Pila

C. Dentallium

D. Toredo

Explanation:

219. Pearl is obtained from

A. Sepia

B. Starfish

C. Oyster

D. Whale

Explanation:

220. Foot is displaced to near the mouth and is divided into arms in

A. Neopilina

B. Pila

C. Chiton

D. Sepia

Explanation: