These have peptidoglycan cell walls. They include most animal pathogens and other commonly encountered bacteria. Fungi are eucaryotes. Fungi are not photosynthetic. They are notable for secretion of enzymes that decompose dead and dying matter.
Yeasts are important for bread, beer, wine.
Some fungi cause infection in humans, for example, vaginal yeast infections are caused by Candida albicans . They are always photosynthetic and usually aquatic or living in moist areas. Some produce toxins. They are almost never pathogenic for animals. Protozoa are eucaryotes.