Re: What's more important, self-organzation or evolution?
- From: j.wilkins1@xxxxxxxxx (John Wilkins)
- Date: Sat, 28 Jul 2007 09:40:47 +0100
dkomo <dkomo871@xxxxxxxxxxx> wrote:
John Harshman wrote:
dkomo wrote:
This was one of the questions I wanted to get answered when I first
poked my head into this n.g. a number of years ago. I must say, I have
been major big time disappointed. Discussions of evolution have been
endless and endlessly repetitive. The received view in biology has been
recycled over and over again. Discussions of self-organization in
biology have been virtually nil.
Yet, I think there is a way to resolve this question, and the answer
IMHO is that self-organization is *way* more important than evolution in
producing the phenomenon of life, as can be seen by examining one
particular aspect of organisms. What do you think that is?
No idea. Why not stop being coy and tell us all what you mean?
An organism's structure and function is vastly *underdetermined* by its
genome. Its DNA governs how protein and RNA molecules are built, when
and how much. It doesn't direct where those molecules are to go inside
a cell and what they are to do. The cell's self-organizational
processes take care of that. In fact, the existence of DNA itself is a
result of those processes
Development of a multicellular organism from a single cell to complete
adult is an excellent example of self-organization. DNA has a
ralatively minor part to play in that. Another example is how brains
wire themselves up automatically. The trillions of synaptic connections
are not mapped at all in DNA.
All selection can do is pick the most effective self-organized forms,
but it does not have detailed control over the tremendous complexity of
that organization.
The problem arises from thinking of DNA as a recipe for an organism and
its phenotype. It ain't. It's part of the evolving causal process by
which chemicals self-organise themselves into organisms from prior
organisms.
--
John S. Wilkins, Postdoctoral Research Fellow, Philosophy
University of Queensland - Blog: scienceblogs.com/evolvingthoughts
"He used... sarcasm. He knew all the tricks, dramatic irony, metaphor,
bathos, puns, parody, litotes and... satire. He was vicious."
.
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