Alexander Fleming had been running tests using Staphylococcus, and he left some plates out to incubate.Evidently, after returning to his lab after the weekend, he found that Penicillium mold was growing on his agar plates containing the growth of Staphylococcus.Looking more closely, he found a large, clear area around the mold colony where Staphylococcus colonies did not grow.Given this situation, a valid hypothesis would be that

Question

Quizplus · Accepted Answer

The clear area around the Penicillium mold colony suggested that it was inhibiting the growth of the Staphylococcus colonies. This supports the hypothesis that the Staphylococcus was being inhibited by the Penicillium mold. Option B is unlikely as mold does not typically kill bacteria. Option C is also unlikely since the same bacteriological medium was used in all plates, including those without mold. Option D is not supported by any evidence and is also unlikely to be a valid hypothesis.

Alexander Fleming Had Been Running Tests Using Staphylococcus, and He