You've learned that microorganisms are classified as 'friends' or 'foes'. Can you think of a specific example of a 'friendly' microorganism and explain its beneficial role in everyday life?
One example of a 'friendly' microorganism is the bacteria involved in fermentation. For instance, yeast (a type of fungus) is used to ferment grapes into wine or grains into beer, and certain bacteria are essential for making yogurt or cheese. These microorganisms break down sugars and produce acids or alcohol, transforming food products and preserving them.