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Phylum Arthropoda - Questions and Answers

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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: