Question

Bacteria that cause ear infections have increased their resistance to antibiotics over time. Which of the following is the selective agent?

A. the human ear
B. bacteria
C. antibiotics
D. the ear infection​

Answer 1

Antibiotics

Step-by-step explanation:

The selective agent in this question would be the antibiotics. As the body grows resistant via the antibiotics, the bacteria itself has as well.

Answer 2

D. The ear infection