STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Closterium desmid. Scanning electron micrograph (SEM) of a Closterium species desmid green alga. Desmids are a common group of freshwater single-celled algae that have intricate cell walls. Magnification: x300 when printed at 10 centimetres wide.
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