The distribution of organisms on the earth's surface is ultimately due to

The distribution of organisms on the earth's surface is ultimately due to evolutionary change: Organisms or  Species do not stay the same over time but are in a constant state of change as individuals. They are best able to live and reproduce within certain environments.  The ability of a species to evolve allows it to exist over long periods of time and withstand the changesoccurringonEarth'ssurface.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.