It grows and reproduces the same way that most molds do. In asexual reproduction, the mold makes spores inside a "sporangium". When the spores are ready to leave and spread more mold, the sporangium breaks open and lets the spores float out. In sexual reproduction its hyphae touch the hyphae of another "Rhizopus" mycelium. When they fuse, they make round balls called "zygospores". After some time, the zygospore makes another sporangium, which then makes spores. During this sexual process, genetic recombination takes place, as with all eukaryotes.