Quote:
|
Originally Posted by CSflim
You've got it the wrong way around. Those are a list of necessary conditions, not sufficient conditions.
|
No, I don't. The three conditions (no mutatons, no reproductive isolation, and no selection pressures) are all the requirements for NO evolution. Any one of the three will cause evolution (except in the case of reproductive isolation, which only CAN cause evolution).
A selection pressure alone can reduce the variety of alleles which qualifies as evolution.
Mutation alone can change the genepool directly by introducing changes in genes which are propagated through reproduction, eventually creating new alleles, which qualifies as evolution.
Reproductive isolation alone can also cause the dissaperance of alleles, although this usually requires a small population size (since it depends completely on random mating disparities without a selection pressure being present).
Since we have mutation, we have evolution. Do we have a retort?