ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph (TEM) of the bacteria, Rhodopseudomonas sp. This oval to rod-shaped bacteria has a polar flagellum that it uses for movement. Some bacteria seen here, with two cells, are budding in a process of cell division. Rhodopseudomonas belongs to the group of 'non- sulphur purple bacteria' in that it develops a purple colour, but unlike sulphur bacteria does not live anaerobically (free of oxygen) off sulphur products. It has pigments in the cell (coloured pink here) that enable it to conduct photosynthesis within its water environment, using organic compounds as a food source. Magnification: x6,000 at 6x4.5cm size.
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