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Evolution

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Question

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When did life appear on earth ?

Solution

500 million years ago.

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Question

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Give another name for origin of life from non living matter.

Solution

Abiogenesis

Question

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What conditions were created by Miller in his experiment?

Solution

Miller created electric discharge in a closed flask that contained CH_4,NH₃, H₂ and water vapour at high temperature like 800 $° C$ .

Question

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Arrange the following substances in a proper sequence with regard to the formation of chemical constituents at the time of origin of life :

Sugar, methane, nucleic acid and amino acid.

Solution

Methane—sugar—amino acid—nucleic acid.

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