MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Flagellate protozoa. Polarised light micrograph (SEM) of a Euglena oxyuris (long, left) and a Phacus sp. (round, right) flagellate protozoan. Flagellate protozoa are single-celled organisms that use flagella (tails) to move. Magnification: x200 when printed 10 centimetres wide.
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