21 Aug '10 14:34>
Originally posted by KellyJayFirst of all, I need to say that I often find it very difficult to understand what you are saying. I often have to guess at what you mean as it is not clear to me what your exact points are.
You wanted to walk
through the evolution of the eye in a thread just for that, we have just started
talking about the issues, first one on my list is communication getting a feature
that is affected by light does not mean the transfer of information is anyway
useful!
Are we at this point at least agreed that communication systems are common throughout life?
Am I also correct that you are not saying that communications systems would not have evolved without eyes, but you are rather saying that when an eye evolves it must simultaneously have a communication system specific to it?
You saying that some of the life today that has light sensitive cells is example
of how it started, I'd have to say prove it!
I don't need to prove it. I don't know how sight started. I suspect it started in a number of different instances in slightly different ways each time. What we are discussing here is not exactly how it started, but whether it is reasonable possible that it did. Your claim is that it could not, my claim is that it is possible.
just start talking about how all of their parts could have started working together to make
light useful. There are a variety of eyes and light sensitive cells, but those are
systems in place things that would have had to get put together correctly in
order to work.
Kelly
And I have given examples where not all those systems are in place and the system still works.
Lets break it down.
This is my claim - it is possible that:
a) an organism had light sensitive cells.
b) at some stage it started using the information generated by those light sensitive cells in order to react in some way.
c) over time, the light sensitive cells got more and more specialized and started to be used for true sight.
Which step are you disputing? Are we discussing human eyes, or are you saying that even the single celled eyes in the worm I linked to previously could not have evolved due to some logical constraint.