eukaryotic organisms that are classified in their own kingdom, Fungi. They are a diverse group of organisms that include molds, yeasts, and mushrooms. Fungi are characterized by the presence of a cell wall made of chitin, and by their mode of nutrition, which is absorption. Unlike plants, fungi do not perform photosynthesis and instead obtain nutrients by decomposing organic matter or by forming mutualistic relationships with other organisms. Fungi play important roles in ecosystems as decomposers and as partners in symbiotic relationships with plants and animals. They also have significant economic and medical importance, as they are used in the production of food, antibiotics, and various other products.
