Question

A population of lizards were living in an area that began to experience a great amount of mountain building. As the mountains formed some lizards were on one side of the mountains and the rest were on the other side of the mountains. Over a period of many years the lizards were no longer able to breed, or had become different species. Why did this happen?

Answer 1

D. The lizards on one side of the mountain were exposed to different conditions and therefore different characteristics were selected.

Answer 2

While the lizards were separated, they evolved and adapted differently to suit their new enviornment.