No, you can't. Not validly, anyhow.By logic we can infer there must be an original living entity that is the source of all the others.
Here's what we can validly infer:
- each ancestral tree has an initial "trunk" from which the "branches" split off.
- this "trunk" is different in some way from the "branches".
That's it. That's all you have. Maybe the difference between the trunk and the branches is that the trunk is non-living. Maybe the difference is that the trunk is living but was never born. At this point, you don't have any good reason to argue your preferred option over the other.
OTOH, our understanding of the laws of physics and chemistry allows us to say that a non-living source is plausible, while a living, unborn source goes against our understanding of how the universe works.