MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Amoeba protozoa. Polarised light micrograph of two (one small and one large) Amoeba sp. protozoa, showing their internal organelles. These freshwater single-celled organisms feed on bacteria and smaller protozoa. They use pseudopodia (limb-like extensions) to engulf food and for locomotion. Magnification: x200 when printed at 10 centimetres wide.
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