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microbiologysociety.org/why-microbiology-matters/what-is-microbiology/protozoa.html

Protozoa. Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium ...

www.theguardian.com/science/2014/apr/10/amoeba-parasite-nibbles-intestines

Apr 9, 2014 ... Microscope reveals how amoeba that kills 70000 people a year works, giving clues to how other infections could operate.

www.biology4kids.com/files/micro_protozoa.html

Biology4Kids.com! This tutorial introduces protozoa. Other sections include plants, animal systems, cells, vertebrates, and invertebrates.