Sample Response: Bacteria are helpful because they produce oxygen, which our bodies need to breathe, and
they help us to digest the food we eat. Bacteria are also
helpful because they are used in medicine to help us
overcome disease. Bacteria are harmful because they
can cause tooth decay and illnesses that can be either
common or quite serious.
What did you include in your response? Check all that
apply.
Bacteria produce oxygen.
O Bacteria help us digest food.
Bacteria can be used to produce medicine.
O Bacteria can cause tooth decay.
O Bacteria can cause illness.