DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Euglena gracilis, fresh water flagellated protozoan. Euglena spp. Euglena sp. normally contain chloroplasts but in prolonged darkness they become heterotrophic and engulf other small organisms. Magnification: x440 when shortest axis printed at 25 millimetres.
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