multicellular molds and mushrooms.

unicellular yeasts

beneficial: they decompose dead organisms, they can be used in production of food, they are part of normal human flora. Other fungi are pathogenic, meaning they may cause diseases (mycoses) in plants, animals and human. Certain fungi, like Candida albicans, can be beneficial when present in small amounts in body tissues, but can overgrow in certain circumstances, like low immunity and become harmful (opportunistic fungi).