Life on Earth first originated in .........

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(A) According to the theory of chemical evolution (Oparin-Haldane hypothesis),life originated in the primitive oceans of the Earth. The early atmosphe

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Water

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(A) According to the theory of chemical evolution (Oparin-Haldane hypothesis),life originated in the primitive oceans of the Earth. The early atmosphere was reducing and contained simple inorganic molecules. Through a series of chemical reactions,these molecules formed complex organic compounds in the water,eventually leading to the formation of the first life forms (protobionts) in an aquatic environment.

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