Saccharomyces cerevisiae
S. cerevisiae is a yeast known commercially for its use in wine, beer and bread making where it is used to ferment foods and drinks. This unicellular yeast is also an important model organism and its one of the most extensively used models for molecular and cell biology research.
[*] Source: http://www.microbiologyonline.org.uk/about-microbiology/introducing-microbes/fungi