In the historical context of microbiology, how did the contrasting experiments conducted by Pasteur and Tyndall contribute to our understanding of microbial growth?

They proved that microorganisms could grow without air.

They demonstrated that microorganisms are present in non-sterile environments but not in sterile ones.

They showed that spontaneous generation is a viable theory for microbial life.

Their work was inconclusive and had no impact on future studies.