STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Cyanobacteria. Coloured scanning electron micrograph (SEM) of cyanobacteria (formally known as blue-green algae, yellow) growing on an evening primrose pollen grain. Cyanobacteria are photosynthesising bacteria that are found in most habitats where water is present. Magnification: x5000 when printed at 10 centimetres wide.
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