Can you quote any examples of recovered proto life measured from any of our space probes?

We have them on the Moon, Mars, and we've had at least one deep impact on a comet. Certainly if there was proto life blowing on solar wind then it should have left measurable deposits in the reachable corners of our solar system where it didn't take root. Can you point me to any links where it's been discovered?

Isn't it more likely that life needs certain basic building blocks that, once available, must fall like dominos in increasing complexity to fill as many evolutionary niches as possible to assure it's survival?

Jammer