When they first appeared, they all had a hard shell to protect them, as they evolved and natural selection removed some of their relatives, this trait was removed and (like octopodes and squid) the shell became a vestigial structure and was removed.
Snails are molluscs, creatures with soft bodies, and worms, i guess, are also molluscs because they have soft bodies
Molluscs are acoelomate; they have no body cavities.
Any of numerous chiefly marine invertebrates of the phylum Mollusca, typically having a soft unsegmented body, a mantle, and a protective calcareous shell and including the edible shellfish and the snails.
All Molluscs possess a body plan of a muscular foot, a visceral mass, and a mantle. Mollusks are also soft-bodied animals coming from the Latin root of the name molluscus meaning soft.
Yes... it's kinda part of what makes them molluscs.
All molluscs are ectothermic; this means that their body temperatures are the same as the surrounding temperature. So if a mollusc is in a pond that is 60F, its body will be 60F. Later in the day, if the pond gets up to 75F, then the molluscs body temperature will rise to 75F as well.
they live in water... Octopus and giant squid is a mollusk... yeah...
Molluscs extract calcium carbonate from seawater to build their shells. They secrete this mineral to form the hard outer layer that protects their soft bodies.
They aren't.Vertebrate means spine, backbone, and jellyfish don't have that.They aren't, jellyfish are invertebrates because they do no have a backbone. they are also a group within the invertibrates called molluscs, they are an invertibrate with a soft body like an octopus.
Bilateral symmetry; often distinct head; muscular foot for movementMantleOpen blood system with heart
The Mantis Shrimp and Mollusks are both invertebrates, but the mantis shrimp is technically in the phylum arthropoda (meaning jointed foot) and a mollusk is from the phylum mollusca (meaning soft body, but usually has a hard shell).
what type of skin does molluscs