Importance: Saccharomyces cerevisiae is one of the most important fungi in the history of the world. This yeast is responsible for the production of ethanol in alcoholic drinks and is the reasons your mother’s bread dough rises in the pan. That is where the names brewer’s and baker’s yeast come from. The process in which it produces ethanol is one way this yeast converts glucose into energy. There are two ways Saccharomyces cerevisiae breaks down glucose. One way is through aerobic respiration. This process requires the presence of oxygen. When oxygen is not present the yeast will then go through anaerobic fermentation. The net result of this is two ATP, and it also produces two by products; carbon dioxide and ethanol. So if this yeast is allowed to grow in a container lacking oxygen it will produce ethanol (alcohol). Humans have been isolating this process since the beginning of history. The yeast helps in the rising of bread with it’s other by-product carbon dioxide. The gas that is produce inside the dough causes it to rise and expand. Both of these processes use the haploid of this yeast for this process. In industry they isolate one strain, either a or ά, of the haploid to keep them from undergoing mating. (Madigan, 457) In the baker’s yeast they have a strain were the production of carbon dioxide is more prevalent then ethanol and vice versa for brewing. (Tomvolkfungi.net) Another importance is that “live yeast supplementation to early lactating dairy goats significantly increased milk production”. (Stella, A.V.;1)