yes
A mollusk is a sea creature that lives within a shell. A cobra does not live in a shell.
THey use a shell
the function of the its shell is to protect the mollusk's very vulnerable and sensitive organs.
Every mollusk except slugs, which have evolved to not need a shell, has a shell. Snails, clams and other bivalves have an external shell. Octopi, squid and cuttlefish have an internal shell.
no
slug
A shell
jellyfish
It is a shell, as in a cockle shell or oyster shell.
no..... slugs are mollusks and they don't have a shell
it is a squid
mantle