STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Desmid. Scanning electron micrograph (SEM) of three desmid green algae. Cosmarium top left, Euastrum top right, and Micrasterias. 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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