* Many species: There are thousands of identified yeast species, and new ones are still being discovered.
* Variations within species: Even within a single species, there can be significant genetic and phenotypic variations.
* Hybrids and mutations: Yeast can hybridize and mutate, creating even more variations.
However, we can broadly classify yeast into:
* Saccharomyces cerevisiae: This is the most commonly used yeast in baking, brewing, and other industries. It's known for its ability to ferment sugar into alcohol and carbon dioxide.
* Saccharomyces pastorianus: This yeast is used primarily in the brewing of lagers.
* Other species: Many other yeast species exist, including Candida, Pichia, Kluyveromyces, and Hanseniaspora, some of which are used in specific industries like winemaking or food production.
Therefore, while there's no single definitive answer to how many types of yeast exist, it's safe to say that there are thousands of species with vast variations within them.
