How many total classes are there for phyla mollusk?

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Multiple Choice

How many total classes are there for phyla mollusk?

Explanation:
The number of living classes within Mollusca is seven in modern taxonomy. These are Aplacophora, Polyplacophora (chitons), Monoplacophora, Gastropoda (snails and slugs), Bivalvia (clams and cousins), Scaphopoda (tusk shells), and Cephalopoda (octopuses, squids, nautiluses). Some older schemes treated Amphineura as a separate class for chitons, which would suggest eight, but contemporary classifications place chitons in Polyplacophora and treat Monoplacophora as its own class, leaving seven total.

The number of living classes within Mollusca is seven in modern taxonomy. These are Aplacophora, Polyplacophora (chitons), Monoplacophora, Gastropoda (snails and slugs), Bivalvia (clams and cousins), Scaphopoda (tusk shells), and Cephalopoda (octopuses, squids, nautiluses). Some older schemes treated Amphineura as a separate class for chitons, which would suggest eight, but contemporary classifications place chitons in Polyplacophora and treat Monoplacophora as its own class, leaving seven total.

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