| http://www.w3.org/ns/prov#value | - Quote:The oxygen in Earth's atmosphere was produced by living creatures such as cyanobacteria, which changed the chemical composition of air over billions of years through photosynthesis.Cyanobacteria was crucial for creating the modern biosphere.Multicellularity has evolved many times, but uniquely as far as I know cyanobacteria shares with eukaryotes terminal (irreversible) differentiation in a
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