agreed.
Question though (and no there's not "theist ulterior motive") Is that a theory on how the eye formed or do we have fossil evidence to prove that? Shyt made sense to me just wasn't sure if it was what we "think" happened or what we KNOW and can proved happened?
its observational and experimental.
Fossil evidence of that sort is hard to prove.
We study the complexity between animals and similiarity among them as well as how their traits are selected for their niche/environment
Plus...it kinda makes sense.
There are bacteria who respond to chemotaxis or basically chemical gradients in solutions. They go towards what they like and turn away from what they don't like. If that process gets more complicated over time, you end up with things that essentially end up being noses.
What we can also do is genetically create "KNOCK OUT" versions of some species. That is, remove the genetic expression of one trait that the animal normally uses and observe how the animal would react.
Some bacteria without light sensitive pigments or chemotaxis end up changing their behavior so we just do studies like that and build on it
Look up cyanobacteria. They basically respond to CERTAIN wavelengths of light (corresponding to green) and use that to create energy.
