Rhizopus oligosporus is a type of mold commonly found in soil and decaying organic matter. It is a member of the Zygomycetes class and is known for its fast growth and ability to thrive in various environments. This fungus plays a significant role in the decomposition process, breaking down organic materials. One of the most notable uses of Rhizopus oligosporus is in the production of tempeh, a traditional Indonesian food made from fermented soybeans. During fermentation, the mold helps to enhance the nutritional value of the soybeans, making them richer in protein and easier to digest.