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Flagellates, unicellular protists, use their flagella to move around. They may or may not produce their own food. A flagellate is both plant and animal. They move by using a hair-like structure called flagella.
Parasites are what feed on your nutrients, as you should know.Flagellum is almost tail-like structure in a prokaryote.Parasitic Flagellates, therefore are parasites with flagellum