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rossum
Guest
Variation is the creative part of the overall process. The selection part filters out the uncompetitive variations.We now know that NS is a conservative process not a creative one.
In an unchanging environment the selection is indeed conservative. In a changing environment then the selection is not conservative, but is biased towards those organisms better adapted to living the the (slightly) different environment. This allows organisms living in an environment to track slow changes in the environment.
rossum