BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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He showed that flies were not produced by meat.
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He showed that microorganisms are present in air.
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He showed that microorganisms cause disease.
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He showed that flies spread disease.
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Detailed explanation-1: -Redi went on to demonstrate that dead maggots or flies would not generate new flies when placed on rotting meat in a sealed jar, whereas live maggots or flies would. This disproved both the existence of some essential component in once-living organisms, and the necessity of fresh air to generate life.
Detailed explanation-2: -He did note that maggots were found on the exterior surface of the cloth that covered the jar. Redi successfully demonstrated that the maggots came from fly eggs and thereby helped to disprove spontaneous generation.
Detailed explanation-3: -However, one of van Helmont’s contemporaries, Italian physician Francesco Redi (1626–1697), performed an experiment in 1668 that was one of the first to refute the idea that maggots (the larvae of flies) spontaneously generate on meat left out in the open air.
Detailed explanation-4: -1668-Francesco Redi put decaying meat in 2 jars. When maggots appeared only on uncovered meat, he concluded the eggs had not come from the meat, and disproved spontaneous generation from non living things.
Detailed explanation-5: -And so first, what we have is Francesco Redi, who was an Italian scientist in the 1600s, who was the first scientist to challenge or attempt to disprove spontaneous generation. And he showed that fly eggs and maggots do not spontaneously generate from decaying meat.