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Overview of the history of life. 4.5 BYA – Earth formed 3.5 BYA – Prokaryotes were abundant 3.0 BYA – Eubacteria and Archaea split 2.5 BYA – oxygen revolution with lots of cyanobacteria 1.5-1.7 BYA – eukaryotes evolve, these are protists
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Overview of the history of life • 4.5 BYA – Earth formed • 3.5 BYA – Prokaryotes were abundant • 3.0 BYA – Eubacteria and Archaea split • 2.5 BYA – oxygen revolution with lots of cyanobacteria • 1.5-1.7 BYA – eukaryotes evolve, these are protists • 1 BYA – protists colonize to form multicellular organisms (seaweeds)