Assertion : Louis Pasteur showed that in flask open to air, new living organisms appeared in the hea

Question

Assertion : Louis Pasteur showed that in flask open to air, new living organisms appeared in the heat killed yeast culture.\ Reason : Life arise from pre-existing life.\

Professor PC Thomas Classes · Answer

(b) : Louis Pasteur, by careful experimentation, demonstrated that life comes only from pre-existing life. He observed that in presterilised closed flasks, life did not come from killed yeast while in another flask open to air, new living organisms arose from 'killed yeast'. He showed that the source of the new appearing microorganisms was the air and the organisms did not arise from the nutrient media.