Which of the following is responsible for the asymmetry in gastropods?

Torsion

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Coiling

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Twisting

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Abdomen

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Solution

The correct option is A Torsion
The gastropods possess an asymmetrical body. Torsion is the rotation of the visceral mass, mantle and shell 180 degree with respect to the head and foot of the gastropod. This brings the mantle cavity and anus to an anterior position above the head, thereby causing asymmetry.
So, the correct answer is option A.

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