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Micro-organisms A-Z

Alga (plural: algae)   A plant-like protist found in water or moist ground. Algae make food by photosynthesis. They range from single-celled organisms to large, multicellular forms, such as seaweed.

Amoeba   A protozoan with no definite shape. Amoebae live in water and move by flowing like a bag full of jelly. They feed on other micro-organisms, such as bacteria, and reproduce by splitting in two. 

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