If you are an organic molecule, a molecule of terrestial life, is it more likely for you to be a part of a big animal, or a microorganism?
Let’s say you break (or not), you will travel from body to body, from a plankton to a fish, then bacteria, a tree, to a pig, or to a human. You spend there short or long. But where will you spend most of your lifetime? A big or a small host?
I would say both.
Could there be a simple answer to this, that applies to every other livable planet, at any stage of their evolution?
On ours, among uniqe species krills consist most of the biomass, human are second, arguably more than pigs and cows (still farmed by us). Though if you count thousands of species of ants as one, they win over all.
Still, seems all sizes are involved at this stage of life.
Geometrically I would say big should win at the end of the game. (Feel a jar with big marbles, then smaller, then sands, etc.)
Economy of scale aside.