The feeding mechanism of the protozoan makes it a PARASITE. A parasite is an organism which live in or on another living organism [host]and derive its nutrients and nourishment from it to the disadvantage of the host. Parasites usually cause harm to the host.
Trichomonas vaginalis is a protozoan that feeds on white blood cells and bacteria living on the cells lining the female human vagina, thereby creating a common sexually transmitted disease often known as "trich." the feeding mechanism of this protozoan makes it a ________.