Answer
Operculum: A hard proteinaceous plate that covers the shell aperture when the body withdraws into the shell.
Torsion: A twisting process that occurs during development.
Fouling: Wastes washing back over the gills.
Bilateral Asymmetry: Occurs with the loss of the gull, auricle, and kidney on the right side of all but a few living gastropods. Bilateral asymmetry occurs when the two halves of an animal's body are not mirror images of each other.
Work Step by Step
Operculum: A hard proteinaceous plate that covers the shell aperture when the body withdraws into the shell.
Torsion: A twisting process that occurs during development.
Fouling: Wastes washing back over the gills.
Bilateral Asymmetry: Occurs with the loss of the gull, auricle, and kidney on the right side of all but a few living gastropods. Bilateral asymmetry occurs when the two halves of an animal's body are not mirror images of each other.
