The single-celled protists are often mobile and use a variety of propulsive mechanisms,for example,the amoeba move by means of

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Amoeba move by extending and retracting pseudopodia, or "false feet," which can grasp onto surfaces and propel the cell forward. Cilia and flagella are used by other protists, such as Paramecium and Euglena, but not by amoeba. Coccoliths are calcium carbonate plates found in certain algae and do not relate to cell movement.

The Single-Celled Protists Are Often Mobile and Use a Variety