FRANK FOX / SCIENCE PHOTO LIBRARY FRANK FOX / SCIENCE PHOTO LIBRARY
Micrasterias desmids dividing. Differential interference contrast micrograph of Micrasterias sp. desmid green algae, showing one dividing through the process of binary fission (lower left). Desmids are a common group of freshwater single-celled algae that have intricate cell walls. Micrasterias is highly adapted to nutrient poor, acidic water. Magnification: x340, when printed 10 centimetres wide.
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