Biology, 03.02.2020 14:02, 8343244

Which of these events occurred during the precambrian time?

cyanobacteria filled the water and air with oxygen.

early humans began to make tools, harvest plants, and make cave paintings.

pangaea, the super continent, was formed.

pangaea began to break apart into many continents separated by shallow seas.

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Which of these events occurred during the precambrian time?

cyanobacteria filled the wa...