State the two principal outcomes of the experiments conducted by Louis Pasteur on origin of life.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: Before Louis Pasteur's experiments, the prevailing belief was in the theory of spontaneous generation, which suggested that life could arise from non-living matter spontaneously.

2. **Pasteur's Experiment**: Pasteur conducted experiments using swan-necked flasks. He placed a nutrient medium (yeast and sugar solution) in these flasks and left them exposed to air but with a design that prevented dust and microorganisms from entering the medium.

3. **Observation of Results**: In the swan-necked flasks, as long as the necks were intact, no microbial growth occurred in the nutrient solution. This indicated that life did not spontaneously generate in the absence of microorganisms.

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