How do gastropods differ from bivalves?
Answers
Answer:
Molluscs possess a soft body, which is divided in visceral mass and foot. Visceral mass remains covered by special skin called mantle, which is capable of secreting a shell.
Gastropods and Bivalve belong to the same phylum, Mollusc, but different classes due to very striking differences.
Explanation:
Class: Gastropod
Symmetry: The gastropods are asymmetrical because of an embryonic event, which is called torsion: this could be followed by coiling; visceral mass is covered by a single piece, usually coiled, shell.
Habitat: They are either aquatic or terrestrial (in damp environment).
Respiration: The aquatic gastropods have gills while in terrestrial gastropods the mantle cavity is converted into lungs.
Example: garden snail and slug (shell lost).
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