[Answer] Earth probably formed _____ years ago and the first life evolved as early as _____ years ago.A.10 billion years ago ... 4.5 billion years agoB.4.5 billion years ago ... 3.9 billion years agoC.6 000 years ago ... 6 000 years agoD.3.9 million years ago ... 2.0 billion years agoE.Humans observed neither event so there is no way to tell.

Answer: C

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Earth probably formed _____ years ago and the first life evolved as early as _____ years ago.A.10 billion years ago ... 4.5 billion years agoB.4.5 billion years ago ... 3.9 billion years agoC.6 000 years ago ... 6 000 years agoD.3.9 million years ago ... 2.0 billion years agoE.Humans observed neither event so there is no way to tell. Earth probably formed ____ years ago and the first life evolved as early as ___ years ago . 4.5 billion years ago ... 3.9 billion years ago . ... The atmosphere of early Earth probably contained no O2 until the emergence of organisms that. used water as … Earth probably formed _____ years ago and the first life evolved as early as___years ago . 4.5 billion years ago .... 3.9 billion years ago . Archaean eon. oldest fossils of cells (prokaryotes) appear origin of Earth ... The atmosphere of early Earth probably contained no O2 until the emergence of organisms that. B.Natural selection could act on a population of proto-cells on early Earth selecting for those that were stable and had self-replicating catalytic RNA that allowed them to grow and divide to produce similar daughter proto-cells. C.Natural selection...

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