the physicist frijoh capra does postulate in his book, the Web of Life, that in the beginning, on earth, there were only one-celled life-beings. through "evolution" uploading additional DNA information, space dust, whatever the one-celled life beings continued to become more complex. i paraphrase of course.
through time, the plants took off in one direction to meet survival needs, and all other life forms took off in other directions, then further bifurcated. again, i paraphrase.
much later, like today, we have the plant kingdom and the rest of us kingdom, all interdependent upon each other down here on the Earth. the Earth was called Gaia much later. as was Mother Earth and Father Sun, or Great Creator. to further clarify, trees breathe out oxygen, breathe in CO2. we are their mirror image in terms of cooperative co-habitation.
others suggest that the plant kingdom is our mirror opposites. the trees are much more adaptable than us, they can live in the worst of conditions, and still re=leaf to bear fruit the next year. we humans have to move around in order to find suitable shelter, if we are to survive the winter onslaughts.
none of that even begins to indicate where life itself first came from. if "man" ever does manage to create life in a terrarium (the Earth) then katy bar the door, because we'll be on our way to a likely great awakening.
