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.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Louis Pasteur, by careful experimentation, demonstrated that life comes only from pre-existing life. He observed that in pre-sterilised 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 micro-organisms was the air and the organisms did not arise from the nutrient media.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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