Gap Filling Quiz

Fill in all the gaps by choosing the correct answer from the dropdown menu
Each word is to be selected only once
Then press the Check button to see your result
Bacteria are single celled organisms that come in many and sizes.
They are living cells that can rapidly.
Once inside the body, they release which are extremely harmful to humans and cause .
Some of these bacteria are food poisoning, cholera, and whooping cough.
Some bacteria are completely harmless to humans whereas others are extremely useful to us such as found in yoghurt.