The term 'Amoeba, for one' is a reference to a type of PROTOZOAN. Protozoans are single-celled organisms that are classified as eukaryotes, meaning they have a nucleus and other organelles enclosed within a membrane. Amoebas are a type of PROTOZOAN that move by extending and retracting pseudopods, or false feet. They are found in freshwater, marine, and soil environments, and feed on bacteria and other small organisms.