The concept of chemical evolution is based on

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(c) : Chemical evolution has two meanings and uses. The first refers to the theories of evolution of the chemical elements in the universe through nuc

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possible origin of life by combination of chemicals under suitable environmental conditions

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(c) : Chemical evolution has two meanings and uses. The first refers to the theories of evolution of the chemical elements in the universe through nucleosynthesis. The second use of chemical evolution or chemosynthesis is as a hypothesis to explain how life might possibly have developed or evolved from non&shy;life.

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$A$ : Theory of biogenesis explains that life arises from pre-existing life.
$R$ : Louis Pasteur finally disapproved the theory of spontaneous generation of life.

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