Mollusks are soft-bodied invertebrates that usually have one or two shells covering their organs. They are classified into three groups: gastropods like snails that have a single shell, bivalves like clams with a two-part hinged shell, and cephalopods like squid that are the most complex with tentacles and jet propulsion. Mollusks provide uses such as food for people and animals as well as pearls and shells for jewelry.

1. Mollusks Chapter 13 Section 1

2. A. Mollusks –soft bodied invertebrates with bilateral symmetry and usually one or two shells with organs in a fluid-filled cavity.

6. 2. Bivalves have a hinged, two-part shell and include clams, oysters, and scallops.

8. Among other uses, mollusks provide food for people and other animals as well as pearls and shells for jewelry and decorations.