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In the phylum, Mollusca through there is bilateral symmetry, but it is lost in some forms, due to the phenomenon, called asA. AsymmetryB. TorsionC. ReversionD. Invagination

Aniket Singh , 1 Year ago
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Askiitians Tutor Team

In the phylum Mollusca, bilateral symmetry is typically present, but it can be lost in some forms due to the phenomenon called "B. Torsion." Torsion is a twisting or coiling of the body during development that can result in asymmetry in certain mollusk species, particularly in gastropods (such as snails). So, the correct answer is B. Torsion.

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