Fill in the Blanks Parasites IOnline version Quick knowledge check parasites I by Annie Taylor 1 protection nutrients nothing support A parasite offers to their hos t 2 food morphology DNA hosts Parasitology is the study of parasites , their and the relationship between them . 3 matur immature growing dangerous Parasites found in definitive host are 4 flies hosts helminths and nematodes arthropod ticks cestodes trematodes worms protozoa The three types of parasites are , and 5 three two four five There are main groups of protozoan parasites that are useful for clinicians . 6 name age host shape food Amoeba are protozoa with no truly defined .