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Statement (s). In many gastropods, the a...

Statement (s). In many gastropods, the anus and mantle cavity are placed anteriorly above the head.
Reason (R ). During embryonic development, in many gastropods one side of the visceral mass grows faster rotates the visceral organs upto `180 degree` in many gastropods.

A

Both A and R are correct and R is the correct explanation of A

B

Both A and R are correct , but R is not the correct explanation of A

C

A is correct , but R is incorrect

D

Both A and R are incorrect

Text Solution

Verified by Experts

The correct Answer is:
A
During development in most gastropods , because of torsion , the animal's anus and mantle cavity both positioned above the head .
Since , one side of visceral mass grows more quickly than other side . Uneven growth rotates visceral mass which ends up 180 degree rotation relative to head .
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