Question

6 of 17 concepts completed fill in the blank question typical gram - negative bacteria are more impervious to the action of antimicrobial chemicals than are gram - positives because gram - negatives have a(n)

Explanation:

Gram - negative bacteria have an outer membrane which acts as an additional barrier, making them more impervious to antimicrobial chemicals compared to gram - positive bacteria which lack this outer membrane structure.

Answer:

outer membrane