Dormant golden-brown alga, SEM
Coloured scanning electron micrograph (SEM) of a dormant cyst of a golden-brown alga (class Chrysophyceae) from wet soil in the Northern Black Forest National Park, Germany. It is surrounded by bacteria. Chrysophyceae are micro-algae with flagella that are used for locomotion. In adverse conditions they form cysts contained in a siliceous membrane and become dormant. Magnification: x5000 when printed at 15cm wide., by EYE OF SCIENCE/SCIENCE PHOTO LIBRARY
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