bivalve wrote:
>
> (For non-biologists, homoplasy is convergent similarity and homology is similarity due to common descent.)
>
> I think we are in basic agreement that function (broadly defined to include developmental constraints, etc.), common descent, design, and convergence can all lead to similarities among organisms. I would emphasize that the presence of a common function does not rule out a role for common descent; perhaps the ancestor already encountered the functional constraints and adapted to them, or the developmental constraints are inherited from a common ancestor.
[Hammond]
Sir Richard Owen pointed out 150 years ago (1847) that the
Vertebrate Skeleton is "3-Axis Cartesian" (as in Cartesian
Coordinates). Turns out the Body-Plan of ALL Plants and
Animals manifests this geometrical cross structure. Therefore
one can properly state that THIS most fundamental and "first
homology" does not stem from a "common ancestor"... it stems
from the Cartesian Geometry of Space itself. As Sir Richard
put it "It was ordained by God and is immune to Evolution".
Thus the "Cross structure" of the human body which is
epitomized in History's central Anatomy lesson- the
Crucifix of Christianity.
This fact, it turns out is far, far more relevant to the
Science-Religion "Creation" controversy than genetic Evolution
which as Owen pointed out 150 years ago, is only a political
Straw Man in the argument, and fodder for pedant conversation.
-- BE SURE TO VISIT MY WEBSITE, BELOW: ----------------------------------------------------------- George Hammond, M.S. Physics Email: ghammond@mediaone.net Website: http://people.ne.mediaone.net/ghammond/index.html -----------------------------------------------------------
This archive was generated by hypermail 2b29 : Thu Jun 14 2001 - 21:34:37 EDT