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(A) The first organisms on Earth are believed to have been chemoheterotrophs. These primitive life forms obtained their energy and carbon from the org

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Chemoheterotrophs

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(A) The first organisms on Earth are believed to have been chemoheterotrophs. These primitive life forms obtained their energy and carbon from the organic molecules present in the 'primordial soup' of the early oceans. They did not possess the machinery for photosynthesis or chemosynthesis,making them dependent on pre-existing organic compounds.

The first organisms that appeared on Earth were

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