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11 grade biology others

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

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1 Year ago

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.