Yeast cells. Coloured scanning electron micro- graph (SEM) of budding yeast cells, Saccharomyces cerevisiae. Known as baker's or brewer's yeast, this fungus consists of single vegetative cells. The larger mother" cells are budding off smaller daughter cells in cell division. At centre one of these budding processes is nearly complete. Saccharomyces cerevisiae is able to ferment sugar, producing alcohol and carbon dioxide in the process. It has long been used in the brewing of beer, production of wine, and in baking leavened bread (causing the dough to rise). Magnification: x4, 640 at 7x5cm size. Magnification: x11,600 at 7x8.5"size."