THE AMNIOTES GROUP:
There are two major reasons why the reptiles were able to move on to land and become terrestrial animals:
-
The development of lungs.
-
The protection of the embryo by the development of a hard, semi permeable to
.
impermeable shell, which also lead to the development of Amiotic Fluid.
-
The development of lungs. 
-
The protection of the embryo by the development of a hard, semi permeable
to.impermeable
shell, which also lead to the development of Amiotic Fluid.
