Cyanobacterial species are thought to be the first photosynthetic organisms. These unicellular bacteria occur in Maine environments, the presence of water acted as a sun-screen, preventing the denaturation of photosynthetic hardware by exposure to high uv. This high volume of Cyanobacteria in the oceans produced vast quantities of oxygen - this allowed organisms to grow in size a their metabolic demands could now be met. At one point the large concentrations of oxygen lead to gigantism. following the first endosymbiotic event, where a cyanobacterial cell became enslaved in a bacterial cell, photosynthetic eukaryotes were 'born'. This lead to the formation of both terrestrial and marine chloroxygenic organisms.
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inserting genes from one sheep into another cell to make a clone
understanding the different structures that make up a cell
examining microorganisms from the deepest parts of the ocean
Our sleep cycles typically last usually 90 to 110 minutes on average.
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The world's oceans are rising due to the distribution of water: snow and ice on land, on average, are melting, and that water ultimately ends up in the oceans.
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