Phylum Arthropoda - Questions & Answers | Exam2Win

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171. The shell of Nautilus is

A. Bivalved

B. Spirally coiled

C. Multi-chambered

D. Both B and C

Explanation:

172. Limax and Helix respire with the help of

A. Ctenidia

B. General body surface

C. Pulmonary sac

D. Buccal cavity

Explanation:

173. Tentacles of Sepia possess suckers

A. All along the inner surface

B. All along the outer surface

C. Both A and B

D. At the tips

Explanation:

174. Teredo is harmful to boats and ships as it can

A. Digest cellulose

B. Bore a hole in the hull

C. Adhere to hull

D. All the above

Explanation:

175. Pearl is secreted when a foreign particle happens to enter between

A. Ostracum and periostracum

B. Periostracum and hypoostracum

C. Shell and mantle

D. Inside mantle cavity

Explanation: