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Q.

Louis Pasteur experimentally demonstrated that

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a

life comes only from pre-existing life

b

protobionts evolved into the first living organisms

c

the formation of life was preceded by chemical evolution

d

life comes out of decaying and rotten matter

answer is C.

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Detailed Solution

Louis Pasteur, through his swan-neck experiment, demonstrated that life comes only from pre-existing life. He showed 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. This disproves the theory of spontaneous generation (abiogenesis). 

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