Re: Evolutionary Theory (convergence is not inevitable)

[John Bois <jbois@umd5.umd.edu>]

On Thu, 19 Feb 1998, Bill Adlam wrote:
> Lenses aren't found in all eyes: Nautilus uses pinholes, scallops use 
> mirrors.  (Obviously photoreceptors are a must.)  Compound eyes give much 
> less acuity than simple eyes for a medium-sized animal, but most arthropods 
> are stuck with them.

This is well-taken.  I should say there is a _limited_ set of solutions
which organisms approach based on their current body plan.  But this is
still quasi-directe