22. Oxygenic photosynthesis by cyanobacteria and prochloron How oxygenic photosynthesis changed the earth's physicochemical environment. Geochemical consequences of oxygen release: oxidation of ferrous iron, establishing an ozon layer. Classification and distribution of oxygenic prokaryotes and eukaryotes. Pigments, photosystems and CO2-fixation mechanisms. Evolution of oxigenic photosynthesis in cyanobacteria-like ancestors. Phylogeny, diverse physiology, morphologies and universal distribution of cyanobacteria. Ancient and modern cyanobacterial stromatolites.
	microeco