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The Planet's Long Youth

... cyanobacterial mats were the principal biomass producers in the Earth’s early years and the early prokaryotic biomass far exceeded that of the modern biosphere. Fossilized remnants of those mats make up thick sedimentary sections of stromatolites (Rozanov and Zavarzin, 1997). The acme of cyanobacteria coincided with the passage from reduced to oxidized rocks, i.e., they evolved in a quite highly oxidized environment with free oxygen in the atmosphere (Zavarzin, 2001; 2003). Which prokaryotes were the dominant Earth dwellers before cyanobacteria?...

Modified: 30.05.2005
Zavarzin , bacteria , RNA , Earth , biomass , eukaryotes , evolution , evolution of life , genes
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