Reptile reproduction also depends on temperature. Only boas and pythons give birth to live young. The other species lay their eggs in a simple nest, and leave. The young hatch days to months later.

Cornified scales of reptiles increased their capacity to live in terrestrial environments. The stratum corneum is very thin, with little keratin. Skin is used for gas exchange. Thick keratin layer ...

Unlike reptiles, amphibians lack scales, relying instead on their skin for protection and respiration. Amphibians lay eggs in water or damp environments. Amphibian eggs are soft and jelly-like ...

And sometimes both like the green anaconda. Nearly all reptiles lay eggs. They also breathe air like we do, so those who live in water must come up for air. As reptiles are cold-blooded they need ...

Turtles are classified as amniotes, along with other reptiles (including birds) and mammals. Like other amniotes, turtles breathe air and do not lay eggs underwater, although many species live in ...

Birds are also warm-blooded but lay eggs, and reptiles are cold-blooded egg-layers that rely on the Sun or another heat source to warm them up. The platypus was initially a challenge to classify due ...