Biology, 03.07.2019 15:30, matt3987

Cyanobacteria seems to have evolved relatively early in earth’s history. what happened to the oxygen the earliest cyanobacteria released? it allowed for more complex life forms to evolve. it reacted with iron in the earth’s crust. it formed the ozone layer. it built up in the atmosphere.

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Cyanobacteria seems to have evolved relatively early in earth’s history. what happened to the oxygen...