However, not all of them are. Some cause illnesses like amoebic dysentary. Amoebas eat by a process called phagocytosis. Their name means bearer of windows. The psuedopodia come out through the windows.
Zoomastigotes contain at least on flagellum.
Like amoebas, most are harmless, however, not all. These organisms are responsible for causing Giardia. Trypanosomes are parasites found in the blood that cause such things as African Sleeping Sickness. Zoomastigotes are the ancestors to the animal kingdom. Collar flagellates are considered the missing link.