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Algae, Blue Green

A phylum of oxygenic photosynthetic Bacteria comprised of uniCellular to multiCellular Bacteria possessing Chlorophyll a and carrying out oxygenic Photosynthesis. CyanoBacteria are the only known organisms capable of fixing both Carbon Dioxide (in the presence of Light) and Nitrogen. Cell morphology can include Nitrogen-fixing heterocysts and/or resting Cells called akinetes. Formerly called blue-Green Algae, cyanoBacteria were traditionally treated as ALGAE.