RE: Peppered Moths and Evolution

Arthur V. Chadwick (chadwicka@swau.edu)
Thu, 12 Nov 1998 09:50:46 -0800

At 07:45 AM 11/12/98 -0800, Pim wrote:

>I mentioned "beak of the finch". It's ironic to see you refer to my
response to your rethoric as rethoric.

The beak of the finch would not be a good replacement for the moths for the
reasons I have already posted, namely it doesn't appear to be ongoing, and
doesn't allow us to observe the process or do experiments on it. In the
peppered moths case, we thought we had everything worked out, and
understood the process in all its pertinent details. Wrong. If we can't
get it right in the case we can study, how can it be an improvement to
substitute an example that is based entirely on inferential data? At
least we can safely (I think) assert that the finch beak story would not
fold like the peppered moth story has, since it is not likely to be
challenged by experimental data, since it is not based on experimental
data, and the beak modification processes do not appear to be going on now.
Art
http://biology.swau.edu