The Kingdom Fungi
This kingdom consists of organisms with cell walls made of chitin. Fungi (except for yeasts) are multicelled but their cell walls are usually incompletely formed. Most fungi obtain nutrients by absorbing dead organic matter.
Molds. Many live on decaying vegetation; some parasites. Example: black bread mold.
Molds, morels, truffles, and yeasts. Form a reproductive structure called an ascus. Some parasitic. Example: brewer's yeast; ergot; powdery mildews.
Mushrooms, rusts, and smuts. Form a clublike reproductive structure called a basidium. Some parasitic. Example: common mushroom; stem rust.
Molds and yeasts. Lack structure for sexual reproduction. Many parasitic. One genus is the source of the antibiotic penicillin. Examples: athlete's foot fungus, damping-off fungus.
Lichens. Symbiotic partnership between fungi and chlorophytes (green algae) or between fungi and cyanophytes (blue-green algae).