About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____. oxygen became available from cyanobacteria banded iron formations developed meteorite impacts increased the atmosphere

About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____. oxygen became available from cyanobacteria banded iron formations developed meteorite impacts increased the atmosphere got thicker from volcanic outgassing

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About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____. oxygen became available from cyanobacteria banded iron formations developed meteorite im…

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