Bread mold reproduce by Spore formation.

Explanation:
Bread mold (Rhizopus stolonifer) is a type of fungus that belongs to the class Zygomycetes. Like other fungi, bread mold reproduces via spore formation.

Spore formation is the process by which fungi produce specialized cells called spores. These spores are capable of germinating into new individuals under favorable conditions.

The process of spore formation in bread mold involves the following steps:

1. Hyphae Formation: Bread mold begins its life cycle as a small spore that lands on a suitable substrate. The spore germinates and produces a network of thread-like structures called hyphae.

2. Mating: When two hyphae of opposite mating types come into contact, they fuse together to form a structure called a zygosporangium.

3. Meiosis: Inside the zygosporangium, the nuclei of the two hyphae fuse together to form a diploid nucleus. This nucleus then undergoes meiosis, a process by which the chromosome number is reduced by half.

4. Spore Formation: The resulting haploid nuclei then divide by mitosis to produce haploid spores. These spores are released from the zygosporangium and can germinate into new individuals under favorable conditions.

In summary, bread mold reproduces via spore formation, a process that involves the formation of hyphae, mating, meiosis, and spore formation.