Not to get off subject, but what are you talking about? There are intermediate reactions that aren't fully worked out, but the overall mechanisms and biochem has been worked out almost fully. I agree that they aren't that simple, but compared to a mammal, or other life forms on earth, they are pretty simple. That was my point actually, when you look at how know a ton about the human body, but we don't know a whole lot about many plant processes (with chlorophyll being one of the most understood.)
