Quote:
Originally Posted by DocIllinois
No. Domains with independent functions mix to combine and produce new complex functions.
Over several generations.
A distinct species is created when a population of that species is physically isolated form the rest, forming its own distinct gene pool. Natural selection will produce mutations and traits that the rest of the species will not develop. Eventually, so many mutations will build that the two species are incompatible with each other and cannot interbreed.
Viola - a distinct species.
Damnit, PRB, now I've got TWO posts in this hodgepodge! 
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interesting, an example please. And that is an example of devolving is it not...or a lessening of DNA strain?