Question

How did Francesco Redi disprove the idea of spontaneous generation?
He showed that flies were not produced by meat.
He showed that microorganisms are present in air.
He showed that microorganisms cause disease.
He showed that flies spread disease.

Answer 1

He showed that flies (maggots) were not produced by meat. Redi's sealed vs. open jar experiments demonstrated maggots came from fly eggs, not spontaneous generation.