What would happen if you breathed in space?

The production of cells during mitosis into specialized function is recombination or differentiation

In the water cycle , when does water undergo a chemical change

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