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bivalves gastropods cephalopods
There are seven classes of mollusks. These are Gastropoda, Bivalvia, Polyplacophora, Scaphopoda, Cephalopoda, Aplocophora, and Monoplacophora.
mollusks and arthopods i very samrt!!
Not clear on which 3 classes are the "major ones", but Polyplacophorans, Gastropods, and Bivalves have an open circulatory system while Cephalopods have a closed circulatory system.
For example acids, bases, salts.
bivalves
a snail is a mollusk
a snail is a mollusk
UnivalvesBivalvesCephalopods
Cephabpoda, Gestropods, and Bivalvia
yes
Six primary classes, three intermediate classes (Junior High) Three Senior classes.