Many, Though Not All, Mollusks Have a Shell

question 34

Multiple Choice

Many, though not all, mollusks have a shell.What secretes the shell?

• A)The foot
• B)The mantle
• C)The radula
• D)The visceral mass

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Definitions:

Signal Transduction

The process by which a chemical or physical signal is transmitted through a cell as a series of molecular events, leading to a cellular response.

Semicircular Canals

Three fluid-filled tubes in the inner ear that play a key role in maintaining balance and detecting head movement.

Bony Labyrinth

A complex system of channels and cavities within the temporal bone of the skull, part of the inner ear structure.

Ampullae

Small bulbous expansions of fluid-filled tubes, particularly in the sensory systems of certain animals, like the lateral line system of fish or the balance organs of the inner ear in vertebrates.