- 1. Pasteur did not agree with the beliefs at the time that life appeared due to spontaneous generation. He believed airborne microbes were the cause of life appearing in meat broth. Airborne microbes being the cause of life served as
his:
Null Hypothesis
Variable
Observation
Hypothesis
Control

His design allowed air inside the flasks to be exchanged with air from the outside, but prevented the introduction of any airborne microorganisms, which would get caught in the twists and bends of the flasks' necks.

ability to mate mark me brainliest

and after water is usually warmed by the sun the water temperature raises and then evaporates .