9 Decide if the following statements refer to bacteria (B), viruses (V) or fungi (F).
1. They require living hosts. □
2. They are made of one single celi. □
3. They produce spores. □
4. They are always harmful. □
5. They can have different shapes. □
6. They can form colonies on the skin. □
7. They are killed by antibiotics. □
8. They can live freely in water. □
9. They are surrounded by a coat of protein. □
10. They have no nucleus. □

10 Listen to a journalist interviewing a doctor about the main differences between bacteria and viruses and choose the best option.

1. Bacteria are ........................... times bigger than viruses.
a. 1 to 100
b. 10 to 100
c. 10 to 1000

2. Viruses
a. need a host.
b. can grow on a non-living surface.
c. need an animal to multiply.

3. Bacteria are ........................... organisms.
a. intracellular
b. intercellular
c. multi-cellular

4. ........................... are harmful.
a. All viruses and bacteria
b. Some bacteria
c. Some viruses

5. Antibiotics
a. are successful with both bacteria and viruses.
b. only destroy bacteria.
c. only destroy viruses.

11 Write a paragraph on the differences between bacteria and viruses. You can ask your teacher for a transcript of the previous activity to help you.

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GLOSSARY

to affect: colpire
host: ospite
loop: anello
to take over: prendere il controllo
treatment: trattamento
widespread: diffuso

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