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Researchers report on new dimension of marine cyanobacteria(图)
marine cyanobacteria new dimension
2014/3/17
Marine cyanobacteria are the tiny ocean plants that form the base of the ocean's food chain. Other organisms feed on them and are nourished by the oxygen they provide.
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Scientists have long known that DNA is arranged in a double helix. But if the double helix did not fold further, each cell's genome would be two meters long — far too large to fit into the nucleus of ...