In Cartilaginous Fishes,the Dermis Contains Bone in the Form of Small

question 35

Multiple Choice

In cartilaginous fishes,the dermis contains bone in the form of small placoid scales called

• A)teeth.
• B)scales.
• C)growth lines.
• D)the lateral line system.
• E)denticles.

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Definitions:

Lac Operon

An example of gene regulation in prokaryotes, involving a group of genes that are involved in the transport and breakdown of lactose in the cell.

Repressor

A substance, often a protein, that inhibits the expression of a gene.

Differentiated Cell

A cell that has developed and specialized to perform a specific function in the body.