Final answer:
Rhizopus sporangia are round structures that grow at the end of stalks and appear as white fuzz on bread mold. They release numerous asexual spores when they open.
Step-by-step explanation:
Rhizopus sporangia are round structures that grow at the end of stalks. Under the microscope, they appear as the white fuzz seen on bread mold. The sporangia of Rhizopus stolonifer have black tips, which are the spore-containing structures. These sporangia release numerous asexual spores when they open.