KARL GAFF / SCIENCE PHOTO LIBRARY KARL GAFF / SCIENCE PHOTO LIBRARY
Amoeba, light microscope footage. An amoeba is a unicellular animal. It uses extensions called pseudopodia ('false feet') to move and capture food. A nucleus contains the amoeba's genetic information. The round structures (yellow) inside the amoeba, revealed by the changing focus, include material ingested by a process called phagocytosis.
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