MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Carchesium colony. Polarised light micrograph of a colony of Carchesium sp. ciliate protozoa. These single-celled protozoa form branching colonies in freshwater streams or ponds. Each individual is composed of a bell shaped body lined with cilia and a long stalk. Magnification: x100 when printed 10 centimetres wide.
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