Biology Forums - Study Force

Discuss the development of reptiles from amphibians. What changes were necessary to allow reptiles to remain on
  land all the time? Why did this change allow access to many new environments for the reptiles to occupy? What will be an ideal response?

The most important change was the development of the amniote egg. This egg allowed
reptiles to reproduce on land without needing to return to the water. Hence, reptiles were not
required to remain close to water bodies and could inhabit a variety of new inland
environments