Question

match the definition with the correct word.
mollusks choose
univalves choose
thin internal shell
one shell
no internal skeletal structure
two shells hinged together
bivalves choose
cephalopods choose

Explanation:

• Mollusks are a broad phylum of invertebrates, which lack an internal skeletal structure.
• Univalves are a type of mollusk defined by having a single, coiled shell.
• Bivalves are mollusks characterized by a shell split into two hinged parts that close together.
• Cephalopods (like squid or octopuses, with exceptions like nautiluses) typically have a reduced, thin internal shell or no shell at all.

Answer:

Mollusks: no internal skeletal structure
Univalves: one shell
Bivalves: two shells hinged together
Cephalopods: thin internal shell