How did life begin?
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The earliest known life-forms on Earth are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.
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Answer:
unicellular organism
Explanation:
Firstly unicellular organisms formed and they this process became complex and more complex and rise of different organisms
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