Fungi can be saprophytes, parasites, or mutualistic symbionts.
These are important, necessary decomposers. Some species of fungi have their hyphae divided into individual cells while others have hyphae that are multinucleate tubes without individual cells. The normal condition for fungal nuclei is 1n, and mitosis happens slightly differently than in other groups of eukaryotes. Some mushrooms are toxic so you should never eat wild mushrooms unless you are absolutely, positively sure what they are. Ergotine can cause spasms and a burning sensation.