Alexander Fleming’s discovery of penicillin in the 1920s happened in part because of his disorganized lab. While straightening up his lab one day, he noticed an unidentified type of mold growing in his petri dishes. All around this particular mold, staph bacteria had been killed. Fleming noted that this eradication of staph bacteria by a mold was highly unusual. Thus began his work on penicillin for which he won the Nobel Prize in 1945.

It can be inferred from the above passage that Fleming’s discovery of penicillin was partly due to

his disorganized lab.

Explanation

The first sentence implies that the discovery of penicillin was mainly due to the disorganization of Fleming’s lab.

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