How does the geographic distribution of organisms support the theory of evolution?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots