LIFE SCIENCE

Detailed explanation-1: -Hint: The outer body of the fishes and reptiles are covered with scales. They are small, thin horny, or bony plates that act as a protection layer to the external body of fishes and reptiles. Scales are typically overlapping each other.

Detailed explanation-2: -Ganoine is a characteristic component of ganoid scales. It is a glassy, often multi-layered mineralized tissue that covers the scales, as well as the cranial bones and fin rays in some non-teleost ray-finned fishes, such as gars, bichirs, and coelacanths. It is composed of rod-like apatite crystallites.

Detailed explanation-3: -In lizards and snakes, the whole skin is covered in overlapping epidermal scales and in turtles and crocodiles in dermal scutes.

Detailed explanation-4: -Fish and snake both have scales.