Help plz suppose your
immune system needed help killing a bacterial
infection. You took a prescribed antibiotic that
killed off all the bacteria in your body. How
would this affect your digestive system?

Antibiotic-induced changes in intestinal bacteria allow overgrowth of another bacteria, Clostridium difficile (C. difficile), which is the cause of a more serious antibiotic-induced diarrhea.

There are effects of absences of bacteria in the body

1. Without bacteria around to break down biological waste, it would build up

2. dead organisms wouldn't return their nutrients back to the system.

3. We wouldn't be able to digest our food properly without our gut bacteria.

4. Dead fish would float to the surface of lakes and oceans, and ocean life would be extinguished.

5. Crops around the world would start to die without the nutrients generated by microbes

looks like you are missing options or a image.