Answer:
Pasteur's flask prevented microorganisms from entering into the broth, thus the broth could not 'generate' living things as was previously believed.
Explanation:
To disprove the theory of spontaneous generation, Pasteur set up an experiment with swan neck flasks. He added broth into a swan neck flask and boiled it to sterilize the broth, then kept it for an extended period. He predicted that if the swan-neck of the flask remained intact, the broth would not be contaminated. Although air could still flow between the flask and the environment, the air-borne microoganisms were trapped in the swan neck.
When the experiment was conducted with a flask with no swan neck, the broth quickly became contaminated.
At the time, there was a popular theory that microorganisms ‘spontaneously’ arose from non-living materials. Pasteur’s experiment helped proved that they generated from parent cells.
In the experiment of Louis Pasteur, to answer the question of whether or not living things can arise spontaneously from nonliving materials - observed and concluded the following
In 1862, the great French scientist Louis Pasteur tested the validity of spontaneous generation. His careful experiment demonstrated that life comes only from pre-existing life
He showed that the source of the new appearing micro-organisms was the air and the organisms did not arise from the nutrient media.
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