How does the examples from redi, spallanzani, and pasteur experiments demonstrate science as a way of knowing

These scientists all carried out experiments in accordance with the basic biological principle that life comes from pre-existing life. This demonstrates that science is a way of knowing because they used what they saw in these experiments in other situations as well. They became able to do this only because they knew about this information and they got to know this information through science.

Proteins vitamins and a carbohydrate is a atom