Why was the neck broken on one flask but not the other? To show that the neck of the flask does not introduce an added variable to the experiment To ensure that conditions were the same in both experimental setups To prevent contaminants from getting in through the neck To allow dust to enter into the broken flask but not the unbroken one To allow air to enter the control flask
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In Pasteur's experiment to test the hypothesis of spontaneous generation, why did he boil the broth in both flasks?
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