Which is NOT a Correct Association of Epidermal and Dermal

Question

Which is NOT a correct association of epidermal and dermal structures and origins?
A)Fish scales-modified collagen
B)Claws-combination of epidermal and dermal components
C)Armor of crocodilians-dermal bones
D)Stratum corneum-callused epidermis
E)Cornified cells-dead keratinized skin cells

Accepted Answer

Fish scales are not derived from modified collagen; instead, they are primarily formed from the dermis layer of the skin, with different types of scales (such as placoid, ganoid, cycloid, and ctenoid) having varying compositions and developmental origins. Collagen does play a role in the structure of scales, but saying they are "modified collagen" oversimplifies and misrepresents their complex biological and evolutionary origins.