Yes. They have extensive cephalization. They have a brain and eyes.
Cephalization
A hydra does not have cephalization.
Bivalves are a class of mollusks that have two shells hinged together, while mollusks are a diverse phylum of invertebrates that include bivalves, snails, and octopuses. Bivalves primarily feed through filter feeding by pumping water in and out of their shells, while other mollusks have various feeding methods.
The cephalization of a mollusca could possibly describe the arrangement of neurons in the front end of the animal.
Cephalization means formation of a head. Cnidarians have no head, so no.
Animals with cephalization respond more quickly and in more complex ways.
Vertebral column is not present in all mollusks.
they do not
nervis system
A sponge.
No. Oysters are mollusks, which have shells rather than bones.
Cephalization is the concentration of nerve cells at one end of the body. All of an earthworms sensory organs, including the nerve cells are in one part of the body. This can be proven through dissection.