Question

Which statement about harmful microorganisms is TRUE?

All bacteria are harmful to humans
Some bacteria can cause infections and illness
Microorganisms never affect other organisms
All viruses are helpful to living things

Answer 1

The true statement about harmful microorganisms is:

**Some bacteria can cause infections and illness.**

While certain bacteria are harmful and can lead to infections, many bacteria are beneficial and play essential roles in processes like digestion and nutrient cycling.