quote:
Is there only one process? I can think of five know processes that can provoke an evolutionary event, or a divergence
It is divergence--of one population from another-- that underlies the existence of all taxonomic groups, from species to kingdoms. So it doesn't matter how many ways that divergence can occur. Divergence is the process common to both micro and macroevolution. Therefore, the terms are, as Dobzhansky said, merely descriptive in nature.
A
Edited by Allopatrik, : No reason given.
Natural Selection is not Evolution-- R.A. Fisher