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Biology · 2024 · 2 marks
CBSE 2024 · Region 1 · Set 3 · Q18
Given below is an illustration of the experiment performed by Louis Pasteur. Explain the experiment and its conclusion.
Given below is an illustration of the experiment performed by Louis Pasteur. Explain the experiment and its conclusion.

Marking-scheme solution
-In pre–sterilized flasks life did not come from killed yeast, while in another flask open to
air new living organisms arose from ‘killed yeast’.
Conclusion – Dismissal of theory of spontaneous generation / life arise from pre-existing life / proved theory of biogenesis
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.