What structure would you expect to find in every type of mollusk (that is, gastropods, cephalopods, and bivalves)?

The options

a. hinge

b. tentacles

c. mantle

d. single-lens eyes

e. valve

The CORRECT ANSWER IS c.

c. mantle

Explanation:

Phylum: Mollusca (Mollusks)

Class: Polyplacophora (Chitons)

Class: Gastropoda (snails)

Class: Bivalvia (Clams)

Class: Cephalopoda (Nautilus, Squid, Octopus)

All mollusks possesses a visceral mass, a mantle, and a foot. The visceral mass houses the digestive, excretory, and reproductive organs. The mantle acts as a covering. It may produce a shell. The foot is muscular and is used for movement, griping, and/or food hunting.

Mantle, can also be termed the pallium, plural  pallia, or palliums, in biology. It as a soft covering (often toughened by calcified plates, of barnacles),

produced from the body wall, of brachiopods and mollusks.

It secretes the shell in organism that make use of shells. In bivalves, it is links edge may be joined at the edge to form siphons for directing water into and out of the mantle cavity.

it would be heredity

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.