Baker's yeast

Baker's yeast is a single-celled fungus, Saccharomyces cerevisiae, that ferments sugars and produces carbon dioxide.

Characteristics

Reproduces by budding and ferments glucose, fructose and other sugars.
Produces carbon dioxide and alcohol when fermenting.
Rich in amino acids and B vitamins.
Cited as a fermentation starter in biol and bokashi.

Role in the preparation: Acts as a fermentation starter, converting sugars from molasses or other sources.

Caution: Store in a cool, dry place, and do not seal containers in active fermentation airtight because of gas pressure.

Sources: Wikipedia - Saccharomyces cerevisiae

Documentary information: this is neither a recommendation for use nor a plant-protection or veterinary claim. Check your country's regulations before any use.