These are multi cellular decomposers such as yeasts, mushrooms, puff balls, penicillium etc. They are without chlorophyll and produce spores. They have heterotrophic type of nutrition. Their body is filamentous and is referred to mycelium. Filaments or hyphae are present which may be multi cellular or multinucleated. Cell wall is made up of chitin. Cellular organization is double envelope. Reproduction can be sexual or asexual. No tissue differentiation. They play a vital role in preserving the environment by cycling the nutrients back to soil.