Rhizopus is the common bread mold. It is of worldwide distribution. This mold grows well on moist bread and fruits. The plant body or mycelium consists of branched hyphae. Hyphae are non-septate. Each hypha is multinucleated. It has a cell wall composed of chitin. Reserve food is present in the form of glycogen. Hyphae are of several kinds. Root like hyphae called rhizoids anchor the fungus, secrete digestive enzymes and absorb nutrients. Other hyphae called stolons grow to form a network over the surface of the food.
The stolons give rise to still another type of hyphae that grow upward from the surface of the food. These hyphae bear sporangium at the tip and are called sporangiophores. Sporangium is sac-shaped structure having spores in it.