Oxygen Evolution in Nature
Photosynthetic oxygen evolution is the fundamental process by which breathable oxygen is generated in earth's biosphere. The reaction is part of the light-dependent reactions of photosynthesis in cyanobacteria and the chloroplasts of green algae and plants. It utilizes the energy of light to split a water molecule into its protons and electrons for photosynthesis. Free oxygen is generated as a by-product of this reaction, and is released into the atmosphere.
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Famous quotes containing the words oxygen, evolution and/or nature:
“All the oxygen of the world was in them.
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All the morning kisses of Philadelphia were in them.”
—Anne Sexton (1928–1974)
“By contrast with history, evolution is an unconscious process. Another, and perhaps a better way of putting it would be to say that evolution is a natural process, history a human one.... Insofar as we treat man as a part of nature—for instance in a biological survey of evolution—we are precisely not treating him as a historical being. As a historically developing being, he is set over against nature, both as a knower and as a doer.”
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“Master of all sorts of wood-craft, he seemed a part of the forest and the lake, and the secret of his amazing skill seemed to be that he partook of the nature and fierce instincts of the beasts he slew.”
—Ralph Waldo Emerson (1803–1882)