IGIT:
You have asked THE seminal question upon which all "extrapolations" of evolutionary biology rest, one that is seldom asked.
Mark Ridley's book "EVOLUTION" contains the following which essentially speaks for the field:
"Darwin's "gradualist" requirement is a fundamental property of biological evolution theory." (page (260)
Ridley then states:
"The Darwinian should be able to show for any organ that it could, at least in principle, have evolved in many small steps---"
Jerry Coyne's recent best seller "Why Evolution is True" depends heavily on the "small steps" that create "new traits" from "pre-existing traits" in the process of species splitting.
Coyne never explains what constitutes a small step, which also speaks for the evolutionary biology field.
The point is to explain and demonstrate the FUNCTIONAL INTERACTIONS and SEQUENCE OF ORIGIN of all the components that make up a small step---references to "mutations" and the like are not explanationa of a process.
For an assessment of the reasion Coyne does not define NOR ILLUSTRATE a small step, see this blog:
Blog not found
and in particular see Episodes 7, 8, and 9.
or search for CDevoclast.
Edited by CDevoclast, : No reason given.
Edited by CDevoclast, : No reason given.
Edited by CDevoclast, : No reason given.
Edited by CDevoclast, : Text omission