why octopus is placed in class cephalopoda and snails in class gastropoda?
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Answer:
The reason why octopus is placed in the class cephalopoda and snails in the class gastropoda are:-
They have a nervous and digestive systems and are very intelligent. Cephalopods were much more diverse in the past than they are today. Most had shells coiled in one plane, but some, like squid today had straight conical shells, some up to 30 feet long. Most cephalopods today are squid, cuttlefish, and Octopi (plural of Octopus; octo=eight legs). The latter have a much reduced internal shell, and octopi have no shell.
Gastropod means stomach foot (gastro= stomach; pod = foot) . Their stomach is located over the muscle that they use to move. They have nervous, and digestive systems, a head, eye stalks and a mouth, Most all live in shells that are coiled, some have no shells. Most are aquatic, but some are terrestrial (land).