MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Stentor ciliate protozoan. Polarised light micrograph of a section through a Stentor sp. ciliate protozoan (dark) on sphagnum sp. moss. These filter-feeding protozoa can reach lengths up to 2mm and are among the largest known unicellular organisms. Magnification: x200 when printed 10 centimetres wide.
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