have scaly skin

Reptiles have dry, scaly skin. Their special covering actually helps them hold in moisture and lets them live in dry places.

Reptile scales are connected in a "sheet," which is the outermost layer of skin. Every so often, this layer of skin is shed and replaced.

turtle skin?

You may not think of a turtle or tortoise shell as being scaly, but they are! They are complex structures made up of bones and scales that develop from the outer layer of skin.

are ectotherms
(cold blooded)

This means that reptiles cannot produce sufficient internal heat to maintain a constant body temperature. Instead, reptiles' body temperature varies, depending on the surrounding temperature.

Most reptiles -- including all turtles, crocodiles, and alligators -- lay eggs. But other reptiles -- about one out of five types of lizards and snakes -- bear live young.