Homer had a low birth weight because his mother did not to eat sufficient amounts of calories during his development during gestation. this best illustrates the power of the:

The distribution of related animals and plants across the world

What is the ecological role of food chains and food webs

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