appendages are how many body parts do they have
a mollusk is an invertebrate which means it has no backbone they are literally spineless they are soft bodied
It is an extra bit to something. For example: The appendix is an appendage to the bowel. Your arms are an appendage to your body.
It is any structure attached to a part of the body of an organism. :)
an invertebrate with a soft unsegmented body, usually protected by a shell in one, two, or three pieces, e.g. the snails and the octopus.