Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.
Sentiment: NEGATIVE
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
The study of evolution is an evolution in itself.
As Darwin himself was at pains to point out, natural selection is all about differential survival within species, not between them.
As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the two simultaneous but quite separate phenomena of adaptation and diversification.
Evolution is a process of constant branching and expansion.
Natural selection is not evolution.
Evolution is an indispensable component of any satisfying explanation of our psychology.
The proof of evolution lies in those adaptations that arise from improbable foundations.
Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how complex organisms like birds, and flowers, and human beings came into existence in the first place.
As a general rule, biology tends to be conservative. It's rare that evolution 'invents' the same process several times.
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