Question

how were redis and pasteurs experiments different?
redi studied broth, but pasteur tested meat.
pasteur studied flies, but redi tested meat.
pasteur tested for microorganisms, but redi studied larger organisms.
redi tested for microorganisms, but pasteur studied larger organisms.

Explanation:

• Francesco Redi's experiment: He used meat in jars (some open, some covered with gauze) to show that maggots (from flies - larger organisms) don't spontaneously generate from meat.
• Louis Pasteur's experiment: He used broth in swan - necked flasks. The design allowed air (but not dust with microorganisms) to enter. Boiled broth remained free of microorganisms until the flask was tilted (letting dust in), proving microorganisms don't spontaneously generate in broth. So Pasteur tested for microorganisms, while Redi studied larger organisms (flies and their maggots).

Answer:

C. Pasteur tested for microorganisms, but Redi studied larger organisms.