Most of the fungi are multicellular, but it is possible to find some that are single celled. Their cells are simple structured, but they do not have locomotory or nervous systems. Unlike plants, fungi do not have cellulose in their cell walls. They cannot convert solar energy into sugar the way plants can. Both asexual and sexual reproduction is common in the fungi kingdom.
Fungi find their food in the environment in which they live.
They absorb nutrients from other organisms, both dead and living. In this way they are an extreme help to the environment. Fungi continue the cycle of life by breaking down the dead organisms into nutrients that can be used by the new. Some fungi are parasites that attach to living plants or animals, and others cooperate with trees and shrubs to exchange essential nutrients. Many plants could not exist without the fungi that live on or near them.