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Pond Life Protozoan • animal-like single celled organisms with a nucleus. • are often classified according to their locomotion – pseudopods, flagella, or cilia Amoebae & Ciliated Protozoa Clearvue & SVE, Inc. Powermedia.com Algae - are plantlike organisms that make food by photosynthesis. There are over 40,000 species! • Most species of algae live in the sea, in lakes, or in ponds. Some single-celled green algae live in moist conditions on land, such as on tree trunks, on the surface of the soil, or on damp brickwork. Others live inside lichens. Clearvue & SVE, Inc. Powermedia.com Flagella • A flagellum is a whip-like structure used for locomotion. This small flagellated Peranema has a long flagellum that only moves at the front end almost like a propellor. • If you remove the gut from a termite and puncture it you will find the gut is crammed with the weirdest looking protists. This variety has many long flagella. • These protists help the termite to digest wood. The actual digestion of the wood is done by bacteria living inside the protists. • The images were made with a 40X objective. The protists are less than a tenth of a millimeter!! Pseudopodia • “False feet” used for movement and are also used to capture prey An Amoeba moves with pseudopods and engulfs its prey. Cilia • Small hair like extensions used for locomotion and for feeding. Euplotes (left) and Stylonychia (right)