FRANK FOX / SCIENCE PHOTO LIBRARY FRANK FOX / SCIENCE PHOTO LIBRARY
Differential interference contrast light micrograph of a Stentor sp. freshwater ciliate protozoan. Here, the Stentor is using its cilia to feed. Some Stentor species can grow to several millimetres in length, making them among the largest single-celled organisms. Magnification: x240 when printed 10 centimetres wide.
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