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, showing micro-organisms (green specks) it has ingested (eaten). 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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