[Phys-L] Re: ultrametricity +- evolution

[Brian Whatcott <betwys1@SBCGLOBAL.NET>]

At 07:48 AM 1/22/2006, you wrote:
> ///
> While I, and others, agree that organisms will change over time and that
> related species will evolve, I find it a large leap to assert that all
> organisms have a common ancestor or that all life derived from nonliving
> material.  The justification(s) for these assertions seem to me to start
> with the assumption itself, and that makes the justifications questionable
> in my mind.  Would a broad base set of coexisting and evolving organisms
> remote in time also generate what we observe?  If not, why not?


People in the field appear to recognize that rates of change in organisms
  are variable - though there are some structures in the cell thought to
  have very much more regular rates of change.
You may have read recently about the three common ancestors in human
genotypes.    One can easily postulate some feature that was
  advantageous in times of extreme environmental stress: perhaps a gene
  for exceptional resistance to high temperature as a hypothetical.
This would have the effect of selecting out perhaps the large majority
  of pre-existing populations who were cold adapted.

Hence on this basis, the evidence for a human "Eve" is insecure.


Brian Whatcott    Altus OK    Eureka!
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