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Evolution — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution3 Marks
Question
Louis Pasteur’s experiments, if you recall, proved that life can arise from only pre-existing life. Can we correct this as life evolves from pre-existent life or otherwise we will never answer the question as to how the first forms of life arose? Comment.
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Answer

For this experiment, Louis Pasteur used a sterilized flask and another flask which was open to air. Killed yeast did not produce new organism in sterilized flask, while yeast new organisms could come into origin in the second flask. This experiment helped in rejecting the theory of spontaneous generation. But lager experiments by Miller showed that organic molecules could develop from inorganic molecules; subsequently leading to origin of life. So, Pasteur’s observation could be corrected to some degree by Miller’s experiment.

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