Received: by alpheratz.cpm.aca.mmu.ac.uk id OAA12739 (8.6.9/5.3[ref pg@gmsl.co.uk] for cpm.aca.mmu.ac.uk from fmb-majordomo@mmu.ac.uk); Fri, 17 Aug 2001 14:47:31 +0100 Message-ID: <3B7D1FFB.733E35DC@bioinf.man.ac.uk> Date: Fri, 17 Aug 2001 14:45:31 +0100 From: Chris Taylor <Christopher.Taylor@man.ac.uk> Organization: University of Manchester X-Mailer: Mozilla 4.77 [en] (Windows NT 5.0; U) X-Accept-Language: en To: memetics@mmu.ac.uk Subject: Re: Callouses and Kings References: <002b01c126a8$a087cc60$e524f4d8@teddace> Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: fmb-majordomo@mmu.ac.uk Precedence: bulk Reply-To: memetics@mmu.ac.uk
> I can almost believe that with calluses, but the gradual emergence of
> complex structures like eyes is highly problematic. Most of what goes into
> an eye has no use unless the whole structure is present.
OK, it's a bit crap, but here's an answer to a problem I did as an
undergrad:
http://www.bioinf.man.ac.uk/chris_t/images/eye_evol.jpg
I do this not so much to explain (Joe etc. just did), just to show that
it's not very controversial anymore (and that I used to sometimes
overbullshit [epidermis?]). I also now want to draw in the first 'at
all' frame. Call me Mr Anal.
I think a good analogy for these sorts of evolutionary 'problems' is
seeing really good trained animals - you (well, I) think 'how the hell
would you start to train an animal to do that' - it's almost impossible
to conceive of what the initial steps might have been, but obviously
there were some. [Probably simple, probably superficially unrelated to
what came after, maybe like 'primitive' early life?]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chris Taylor (chris@bioinf.man.ac.uk)
http://bioinf.man.ac.uk/ »people»chris
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