What role does yeast play in our lives

Yeast is a fungus with a life cycle that humans have been taking great

advantage of for thousands of years.

Yeast eats carbohydrates, like sugar or grain, and produces alcohol and

carbon dioxide gas.

We put yeast in our flour dough, and the carbon dioxide poofs up the

dough to make bread.

We put yeast in soups of various fruits and vegetables, and the alcohol

turns it into wine or beer.