Question

Which prefix changes the meaning of bacterial from "relating to or caused by bacteria" to "preventing bacteria"?

Answer 1

Answer:

anti-  

Explanation:

Answer 2

$\huge{\boxed{\text{anti-}}}$

The prefix anti- means “against”. Preventing bacteria is basically the same as being against bacteria, so the $\boxed{\text{anti-}}$ prefix can be added to make the word “antibacterial”.