|Yeast cells under a microscope.|
|A diagram of a typical yeast cell|
A particular species of yeast, Saccharomyces cerevisiae, has been used for a very long time. It is used for baking bread. It is also used in fermentation to make ethanol. This method makes many drinks, such as beer or wine. Ethanol is also used as fuel and to make other organic chemicals.
- Compressed fresh yeast - 1.jpg
A block of fresh yeast
- Dry yeast.jpg
Dry yeast (usually, yeast is sold like this)