Donald Frack quoted Michael Majerus:
>The case of melanism in the peppered moth IS ONE OF THE BEST EXAMPLES
> OF EVOLUTION IN ACTION BY DARWIN'S PROCESS OF NATURAL SELECTION
>that we have. In general it is based on good science and it is sound.
What about the distinction between variation and evolution? Pierre Grasse is
the only one I recall who explicitly raises this issue.
Species have ranges of variation, and the environment can, by natural
selection,
favor a preponderance of a particular variation. When does variation become
evolution? I would think the answer is 'when the variation is irreversible.'
By
this standard, the peppered moth phenomenon is not evolution.
Cliff Lundberg ~ San Francisco ~ cliff@noevalley.com
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Donald Frack quoted Michael Majerus:
>The case of melanism in the peppered moth IS ONE OF THE BESTEXAMPLES
> OF EVOLUTION IN ACTION BY DARWIN'S PROCESS OF NATURAL SELECTION
>that we have. In general it is based on good science and it issound.
What about the distinction between variation and evolution? PierreGrasse is
the only one I recall who explicitly raises this issue.
Species have ranges of variation, and the environment can, by naturalselection,
favor a preponderance of a particular variation. When doesvariation become
evolution? I would think the answer is 'when the variation isirreversible.' By
this standard, the peppered moth phenomenon is not evolution.
Cliff Lundberg ~ San Francisco ~ cliff@noevalley.com
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