The opening of the shells of some gastropods is protected by the:
A) parapodia.
B) setae.
C) operculum.
D) head.
E) cerata

Question

Quizplus · Accepted Answer

The operculum is a structure found in some gastropods that serves to protect the opening to their shell. It is often made of a hard, calcareous material and can be used to seal the shell closed when the animal retracts inside. The other structures listed (parapodia, setae, head, and cerata) are not typically involved in protecting the shell opening.

The Opening of the Shells of Some Gastropods Is Protected