2. the Alexander Fleming Discovered penicillin SIM just admixture in it. First and foremost is important. The hypothesized. The observations and issues. Experiments to test the issue. Search and trial tests.
2. The Alexander Fleming's discovery of penicillin drugs then. The first priority is postulated. Observing and Experiments to test problem Search and Test Lab
2. That Alexander Fleming discovered penicillin drugs that priority.The hypothesis.Observation and trouble.The experiment to test the problem.Search and test experiments.