Viewing animals as biological machines creates the question if humans are machines, too. This could go either way.
Society could insist that humans are different, which explains why knackered animals can be put down, but elderly humans cannot. Such a dogma might (a) limit biology in general, and (b) limit the use of animal experiments in medicine.
It is not possible currently, but maybe in the coming decades it is possible with technology and human ideas. We are now trying to make lives on planets other than the Earth such as mars, the moon, etc. So the tech we are using to make life possible there, the same equipment can be used to live without trees on the Earth.
Like the Inuit or Mongolian tribes
So assuming no trees and vegetation all you have to work with are rocks, minerals and animal stuff. This seems a lot like how the Inuit live where this is relatively the case or somewhat less how Mongolian tribes lived on the steppes.
I don't know how far up the technology tree you are looking at so I will make a start.
I don't think humans would evolve at all in a world with no trees.
According to the general agreement on the evolution of hominids, what later became homo sapiens started developing as they were forced to abandon the trees because of an environment turning more and more savanna-like, with scarce trees.
If trees never existed in the first place, that path ...