1. Only about one tenth of the cells in your body are really you.
B)
2. Bacteria are mostly helpful.
A)
3. Animals need bacteria to digest food.
C)
4. You have 7 octillion cells in your body.
C)
5. Most of the atoms are empty space.
C)
6. You probably have mites in your eyelashes.
C)
7. Mites are very small creatures that are about a third of a millimetre long.
B)
8. Mites eat your eyelashes.
B)
