ROGELIO MORENO / SCIENCE PHOTO LIBRARY ROGELIO MORENO / SCIENCE PHOTO LIBRARY
Micrasterias alga. Polarised light micrograph of a single Micrasterias desmid green alga. Desmids are a common group of freshwater single-celled algae that have intricate cell walls. Micrasterias is highly adapted to nutrient-poor, acidic water.
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