a squirrel dropped an acorn from a banch of an oak tree which of these will change as the acorn falls from the tree to the ground the mass of the acorn the desity of the acorn the force or the velocity

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