An organism's development is controlled by the genome of the zygote as well as by molecules from the mother that are in the cyoplasm of the egg. what are these proteins and rnas called

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of