Question

Torsion creates asymmetry in mollusc???
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Answer 1

Answer:

Torsion (twisting) is the rotation of visceral organs in anticlockwise direction through an angle of 180° on the rest of the body during larval development. The phenomenon takes place in the free-swimming (veliger) larva of gastropods and converts the symmetrical larva into an asymmetrical adult.

Answer 2

Answer:

• 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