Multiple choice

With less helpful bacteria....

  1. Living things just get sick

  2. Harmful bacteria can move in and create more

  3. Living things are just healthy

  4. Living things cannot survive
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Helpful bacteria often occupy niches that prevent harmful bacteria from colonizing. When helpful bacteria are reduced, harmful bacteria have more space and resources to multiply.

Keep practicing — related questions