What do the groups of mollusk share?

Answer 1

Mollusks, a diverse group of invertebrates, share several key features, including a soft body often protected by a hard shell made of calcium carbonate. They possess a muscular foot used for locomotion or attachment, and many have a specialized feeding structure called a radula for scraping food. Additionally, mollusks exhibit a coelom, a fluid-filled body cavity, and are bilaterally symmetrical. These characteristics unify the various classes of mollusks, such as gastropods, bivalves, and cephalopods.