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Question

The elephant tusk shell can be classified under which of the following category?

A
Dentalium
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B
Nautilus
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C
Limax
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D
Octopus
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Solution

The correct option is A Dentalium
The elephant tusk is defined under the genera dentalium. It is a species of scaphopod mollusc. They are greenish fading to white at the tip. This tusk shell is used for burrowing the sand with the help of the boat-like foot. They lack a head, gills and eyes. The radula is simple and the excretion is done by nephridia.
Thus, the correct answer is option A.

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