Protozoa ● Protozoa mainly feed on bacteria, but they also eat other protozoa, and sometimes fungi. Hence statement 1 is correct. ● Some protozoa absorb food through their cell tissues. ● All protozoa digest their food in stomach-like compartments. As they digest, they make and give off nitrogen, which is an element that plants and other higher creatures can use. Hence statement 2 is correct. ● Most protozoa do us no harm. But there are a few that cause diseases. ● One type of amoeba can live in human intestines. ◦ It feeds on red blood cells and causes a disease known as dysentery. ● Another species of protozoa can sicken hundreds of thousands of people when it gets into the tap water. ◦ Perhaps the best-known deadly protozoa cause malaria. Hence statement 3 is correct.