Mike got a bad case of strep throat. Mike’s doctor gave him some antibiotics to kill the bacteria that were causing the strep throat. Mike used the medicine and got better. Two months later, Mike got strep throat again. His doctor gave him the same medicine. However, this time Mike did not get better. What is a good hypothesis explaining why Mike did not get better?
The antibiotics were too strong.
The strep throat bacteria that were resistant to the antibiotics survived and reproduced.
Nothing can explain what happened.
The strep throat bacteria had learned how to stay away from the

Question

Mike got a bad case of strep throat. Mike’s doctor gave him some antibiotics to kill the bacteria that were causing the strep throat. Mike used the medicine and got better. Two months later, Mike got strep throat again. His doctor gave him the same medicine. However, this time Mike did not get better. What is a good hypothesis explaining why Mike did not get better?
The antibiotics were too strong.
 The strep throat bacteria that were resistant to the antibiotics survived and reproduced.
 	Nothing can explain what happened.
 The strep throat bacteria had learned how to stay away from the

anonymous · Answer

B. The strep throat bacteria that were resistant to the antibiotics survived and reproduced.