you might try this abstract or the real miccoy
http://www.endeav.org/evolut/text/canada2001/
quote:
Now I would like to say about the model of chirality formation. A model of arising of asymmetry in the bioworld is proposed. It is supposed that chemical evolution on Earth may have started from the uniform distribution of enantomorphous forms of substances. It is postulated and substantiated the role of Earth rotation in the selection of asymmetry signs of living and inorganic macro-structures (higher levels hierarchical structures) could lead to the selection of asymmetric substructures (i.e. microstructures forming macro-structures) including D- and L- forms of molecules.
It was established that the evolution is described both by thermodynamic and kinetic factors and by the trajectory factor (symmetry or chirality) which should be accounted for in rotating coordinate systems. The Coriolis forces can support spiral bio-structures to a different degree depending on the habitation area of organism.
I will explain my own understanding in this if this is not enough. The true challenge is to conceive the error in Nelson and Plantnick's lack of "informative pathway" in the habitation areas by perhaps a spatial synthesis of Croizat and Gladyshev via Wright equilibria.
"Modern workers have sought in spatial representation a means for resolving natural groups, rather than merely portraying the affinites of groups already recognized by other means. Spatial analysis has been extended to many dimensions (Sneath and Sokal 1973), and various graphic devices have been developed in order to portray spatial affinites (figure 2.46) Yet the overall goal - the resolution of natural groups - has proved elusive through spatial analysis and representation, inasmuch as an informative pathway seems unspecifiable by these considerations alone."
SYSTEMATICS AND BIOGEOGRAPHY by Gareth Nelson and Norman Platnick Columbia Press 1981 page 105
This message has been edited by Brad McFall, 04-17-2005 06:14 PM
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