(c) : Mucor is a filamentous fungus found in the humus of soil decaying fruits, vegetables. It is commonly known as black mould. Most of the Mucor sp. are unable to grow at 37°C and the strains isolated from human infections are usually one of the few thermotolerant Mucor sp. Colonies of Mucor grow rapidly at 25 - 30° C humidity about 90 - 95% and quickly cover the surface of the agar. It requires moist and shady place for its growth. Many sp. of Mucor are responsible for causing roting of fruit and vegetables. A few sp. e.g., Mucor pusillus are pathogenic to man.