Evolution and natural selection
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Evolution and natural selection are generally seen as related, in that many biologists say natural selection "drives" evolution, in the since of giving rise to it or causing it. Others say that selection merely "steers" the process of speciation and is not in any way a causative force.
Modern evolutionary theory holds that new forms of life, notably species, come into being as a result of random natural processes.
After a new species comes into being, it tends to either flourish or die out. Better adapted species produce more descendants and tend to push out from their local environment the more poorly adapted species (see Ecology).
Some species have advantage at a particular place for example black rabbits in dense jungles,while lighter coloured will have advantage in open areas.This leads to different evolution of (at one time) same species.
- Same is the case with humans,people who live in Africa have Evolved slightly Differently then those,say in North America
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