Siphon of cephalopods is connected internally to

Mantle cavity

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Anus

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Haemocoel

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None of the above

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Solution

The correct option is A Mantle cavity
Siphon is an anatomical structure that is present in the three classes of phylum Mollusca, namely Gastropoda, Bivalvia and Cephalopoda. Siphon of cephalopods is connected internally to mantle cavity. It is a tube-like structure through which water flows and is directed to mantle cavity. This water flow is used for locomotion, feeding, respiration or reproduction.
Thus, the correct answer is option A.

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