Yeast is a single-cell organism which needs food, warmth and moisture to survive. It is classified as a member of the fungus kingdom. It converts sugar and starch into carbon dioxide and alcohol through the process of fermentation. Yeast reproduced asexually with a process called budding, which is an asymmetric division process.In yeast, budding usually happens when they have an abundant supply of food and nutrition. During reproduction, a small bud grows from the part of the parent body. And then the parent’s nucleus yeast splits into daughter nucleus and transferred to the daughter yeast cell. After some time this new bud separates from the parent body and grows into a new yeast cell.