kyleeb00
kyleeb00
07.03.2020 • 
Chemistry

HELP BHFSDHFB IM STRESSED AND I CANT THINK STRAIGHT
In his experiment on spontaneous generation, Louis Pasteur changed only one thing between his experimental groups: whether or not the neck of the flask was broken. That means that his experiment was .
A. controlled
B. randomized
C. testing a hypothesis
D. answering a well-defined question

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