A. single-celled prokaryotes
B. Phototrophic eukaryotes
C. Eukaryotes single-celled and primitive multi-celled organisms
D. heterotrophic eukaryotes
A fungus (plural: fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, which is separate from the other eukaryotic life kingdoms of plants and animals.