The experiment focused on the effect of light on mold growth and the relationship between mold and bacteria. Molds are fungi responsible for both desirable and harmful effects in food.
The one difference in the experiment is the presence or absence of light, called LIGHT.
When testing Fleming's hypothesis, he grew bacteria colonies on glass plates and introduced mold to some of them. The presence or absence of mold affected the growth of bacteria, proving his hypothesis.
Molds are fungi that reproduce through spores and can be beneficial or harmful in food.
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