Well, since it has been proved that decisions take place in the universe (Dubois, 2000), how about we start figuring out by which decisions some species, or categories of organisms were created?
The method in this science is to trace back the likelyhood of an event towards zero. That way we will find all decisions along the way, which from nothing made the thing happen. In this science time is understood historically, or rhythmically, as a sequence of decisions, rather then relatively by motion.
So case in point, plants, at what time in the universe did reproducing entities that use light to store energy in molecules become likely? My thinking is that for the main part such would have been likely near the start of the universe already, because it all seems such a basic thing. So it was decided near the start of the universe that there would be plants.
Who else can give some information about the likelyhood of plants coming to be?