Question

which of the following is not a subphylum of mollusks?gastropodsbivalvesarthropodscephalopodswhich of the following is not a bivalve?musselconchclamoyster

Explanation:

• First question: Mollusks have sub - phyla like Gastropods (snails), Bivalves (clams, oysters, mussels), and Cephalopods (squid, octopus). Arthropods are a separate phylum (e.g., insects, crustaceans).
• Second question: Bivalves have two shells. Mussels, clams, and oysters are bivalves. Conchs are gastropods (a single - shelled mollusk group).

Answer:

• First question: Arthropods
• Second question: Conch