What is a Gastropod?

What is a Gastropod?

• A. Cephalopods
• B. Bivalve
• C. Gastropod
• D. Mollusk

Answer: (C)

Gastropods are a class of mollusks that includes creatures like snails and slugs. They typically have a distinct head with sensory tentacles, a broad muscular foot for crawling, and usually a single shell (though many are shell-less). During development they often undergo torsion, which twists the body so the mantle cavity and anus end up positioned over the head in adults. They also use a radula, a rasping tongue, to feed. This combination—being a mollusk with a single shell or none, a prominent head, and a specialized foot—defines gastropods. It’s different from cephalopods (like octopuses and squids), which have multiple arms and advanced brain/eyes, and from bivalves (like clams and oysters), which have two shells and no distinct head. The broader term mollusk is the phylum that includes gastropods as one of its main groups.

Gastropods are a class of mollusks that includes creatures like snails and slugs. They typically have a distinct head with sensory tentacles, a broad muscular foot for crawling, and usually a single shell (though many are shell-less). During development they often undergo torsion, which twists the body so the mantle cavity and anus end up positioned over the head in adults. They also use a radula, a rasping tongue, to feed. This combination—being a mollusk with a single shell or none, a prominent head, and a specialized foot—defines gastropods. It’s different from cephalopods (like octopuses and squids), which have multiple arms and advanced brain/eyes, and from bivalves (like clams and oysters), which have two shells and no distinct head. The broader term mollusk is the phylum that includes gastropods as one of its main groups.