Question

15 Tom left a piece of bread in a plastic bag in the kitchen before he went on tour for 2 weeks When he reached home after 2 weeks, he found some black patches on the bread Black patches Bread 1.51 Tom's mother told him that the black patches are a type of micro- organisms. What type of micro-organisms are the black patches on the bread? 1.5.2 List THREE conditions needed for the micro-organisms to grow on the bread 153 What could Tom do to the piece of bread to prevent micro-organisms from growing on the bread? Why does the method mentioned in QUESTION 153 work? (3) (1) (2)​

Answer 1

1.5.2 The three conditions needed for the micro-organisms to grow on the bread are moisture, warmth, and food.

1.5.3 To prevent micro-organisms from growing on the bread, Tom could freeze the bread, store it in an airtight container, or dry it out. Freezing the bread works because it stops the growth of micro-organisms by preventing them from reproducing. Storing the bread in an airtight container works because it prevents moisture from entering the container and prevents the growth of micro-organisms. Drying out the bread works because it removes the moisture that micro-organisms need to survive and reproduce.