lol lisa... indeed! It is a scientific discovery, nothing more.
Speargrass, why speculate? Why guess? Why not find out based on answers we have discovered for some time now. Science has answered most of your questions mentioned, already. There is no need to make up an answer. Especially a vague, non scientific, unhelpful answer such as 'consciousness did it'.
If you really want to know why and how cells replicate, go read upon RNA, DNA and meiosis and mitosis. Want to know why plants face the sun, go read up on photosynthesis and the 'z scheme' of energy trsnsfer.
If you REALLY want the answers to your questions, ignoring that the answers are easy to find in 2014 and you haven't sought them, go buy a textbook! The reality is...the answer exists, ask yourself why you don't know it....IF you truly seek it...big IF.