1. Yeast (Saccharomyces cerevisiae): This single-celled fungus is a workhorse in the food industry! It's responsible for:

* Baking: Yeast ferments sugars in dough, producing carbon dioxide gas which makes bread rise.

* Brewing: Yeast ferments sugars in grain, producing alcohol and carbon dioxide, which is essential for beer and other alcoholic beverages.

* Biotechnology: Yeast is used in producing various products like vitamins, enzymes, and biofuels.

2. Mushrooms (various species): Mushrooms are the fruiting bodies of certain fungi. They are:

* Food: A delicious and nutritious food source, providing protein, fiber, and essential vitamins and minerals.

* Medicinal: Some mushroom species have medicinal properties, used in traditional medicine and modern supplements for immune support, anti-inflammatory effects, and more.

There are many other useful fungi, including those used for food, medicine, and even environmental remediation.