The first cells or primitive cells were

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(A) According to the Oparin-Haldane hypothesis of the origin of life,the early Earth's atmosphere was reducing and contained simple organic molecules

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marine and heterotrophic

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(A) According to the Oparin-Haldane hypothesis of the origin of life,the early Earth's atmosphere was reducing and contained simple organic molecules in the 'primordial soup' of the oceans.These primitive cells,often referred to as protobionts or eobionts,evolved in the marine environment.Since the environment was rich in pre-existing organic molecules,these early life forms did not need to synthesize their own food and thus were heterotrophic in nature.Therefore,the first cells were marine and heterotrophic.

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