- have chitin cell walls
- most are terrestrial (forest)
- they use organic chemicals for energy (do NOT photosynthesize)
- molds and mushrooms are multicellular
- yeasts are unicellular
A fungus (pronounced /ˈfʌŋɡəs/; pl. fungi or funguses) is a member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds (British English: moulds), as well as the more familiar mushrooms. These organisms are classified as a kingdom, Fungi, which is separate from plants, animals, and bacteria. One major difference is that fungal cells have cell walls that contain chitin, unlike the cell walls of plants, which contain cellulose. These and other differences show that the fungi form a single group of related organisms, named the Eumycota (true fungi or Eumycetes), that share a common ancestor (a monophyletic group).