The Class Zygomycetes is a group of fungi known for forming zygospores, thick-walled resting spores produced during sexual reproduction. Most are saprophytic, decomposing dead organic matter, while some are parasitic on plants or animals. They typically grow as fast-growing, filamentous hyphae without septa (coenocytic). Zygomycetes are commonly found in soil, decaying food, and plant debris, and include species like Rhizopus stolonifer, the black bread mold.