8. How is penicillin used? O to make cheese
O to kill protists that cause disease
O to kill bacteria that cause disease
O to make bread rise

O to kill bacteria that cause disease

Explanation:

penicillins are a group of antibiotics used to treat a number of bacterial infections.

hope this helps!

Collapsed lung

Explanation:

Collapsed lung: A broken rib may tear your lung or chest wall, which can cause your lung to collapse. Signs that this has happened include trouble breathing, coughing up blood, and severe chest pain.