No.
No, the siphonophore belongs to a different phylum - cnidaria, along with jellyfish; the chiton is a mollusc, phylum molluscae along with snails and bivalves.
No, a mollusc is a mollusc.
sand burrowing mollusc
rine mollusc's homne
The economic importance of mollusc is that there are a staple food in many countries.
No, its a Mollusc
no, they are invertebrates
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yes it is
yes.
No they are arachnids
The giant clam.