A Cow's Response to a Zero G Situation

If we find evidence that simple life forms havent been able to exist in the past on mars, then we could be av a speculate further. Would it be possible to colonize mars, starting with very simple, ah units, self sufficient units and living in colonies of it like space chattels? And would we be able to develop agricultural mars? That's the big one, and that that goes tothe very heart of this microbial question. Of course, if we were, it would be many hundreds of years away, but it's very exciting thought.