Which one of the following features does not belong to phylum mollusca

1.	Which one of the following features does not belong to phylum mollusca?
A.	Body is bilaterally symmetrical.
B.	They have a closed circulatory system.
C.	Body is often protected by a hard calcareous shell.
D.	They have kidney- like organ for excretion.
E.	None of these
Answer» C. Body is often protected by a hard calcareous shell.

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Which one of the following features does not belong to phylum mollusca?

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