What is a Mollusk?

What is a Mollusk?

• A. A type of fish
• B. Mollusk
• C. A plant
• D. A class of birds

Answer: (B)

A mollusk is an animal that belongs to the phylum Mollusca, a large group of invertebrates with soft bodies. Most have a mantle that can secrete a shell, a muscular foot for movement, and a visceral mass containing the organs. Many mollusks also have a radula for feeding. The group includes snails and slugs (gastropods), clams and oysters (bivalves), and octopuses and squids (cephalopods). They are distinguished from fish, plants, and birds by being invertebrates with soft bodies, not vertebrate animals like fish or birds, and not plants.

A mollusk is an animal that belongs to the phylum Mollusca, a large group of invertebrates with soft bodies. Most have a mantle that can secrete a shell, a muscular foot for movement, and a visceral mass containing the organs. Many mollusks also have a radula for feeding. The group includes snails and slugs (gastropods), clams and oysters (bivalves), and octopuses and squids (cephalopods). They are distinguished from fish, plants, and birds by being invertebrates with soft bodies, not vertebrate animals like fish or birds, and not plants.