PerspectiveEvolution

Tracing Oxygen's Imprint on Earth's Metabolic Evolution

Science  24 Mar 2006:
Vol. 311, Issue 5768, pp. 1724-1725
DOI: 10.1126/science.1125937

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Summary

As oxygen built up in Earth's atmosphere during the Precambrian, organisms evolved more complex biochemical networks. This expansion made feasible oxygen dependent metabolisms that coopted parts of preexisting anaerobic ones.