Blue algae (microscopic 3D schematic diagram)
Cyanobacteria, also known as blue-green algae, are a type of large single-cell prokaryotic organism with a long evolutionary history, Gram negative staining, no flagella, containing chlorophyll-a but not chloroplasts (different from eukaryotic algae), and capable of oxygen producing photosynthesis. The difference from photosynthetic bacteria is that photosynthetic bacteria (red snails) undergo more primitive photosynthetic phosphorylation and do not release oxygen during the reaction process, making them anaerobic organisms, while cyanobacteria can carry out photosynthesis and release oxygen.
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