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Theory of Panspermia and Chemical Evolution

Who proposed ...

Question

Who proposed that the first form of life could have come from pre-existing, non-living organic molecules?

A

SL Miller

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B

Oparin and Haldane

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C

Charles Darwin

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D

Alfred Wallace

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E

Hugo de Vries

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Solution

The correct option is B Oparin and Haldane
Theory of abiogenesis was proposed by Oparin and Haldane. It proposed that the first form of life could have come from pre-existing, non-living organic molecules. Thus, option B is correct.

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Q. Who proposed that the first form of life could have come from pre-existing non-living organic molecule?

Q. Oparin and Haldane proposed that the first form of life could have come from pre-existing living organic molecules.

Q. Assertion: Oparin and Haldane proposed that the first form of life could have come from pre-existing non-living organic molecules.
Reason: The condition of early Earth were high temperature, volcanic eruptions, reducing atmosphere with methane, ammonia, and oxygen.

Q. Consider the following three statements and select the correct option stating which one is true (T) and which one is false (F).
(i) Oparin of Russia and Haldane of England proposed that the first form of life could have come from pre-existing non-living organic molecules (e.g., RNA, protein, etc.) and that formation of life was preceded by chemical evolution.
(ii) Based on observations made during a sea voyage round the world, Charles Darwin concluded concluded that existing living forms share similarities to varying degrees only among themselves.
(iii) Evolution by natural selection must have started when cellular forms of life with different metabolic capability originated on Earth.

1953

, S.L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include.

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