The dots represent a bacterial infection. Sal was very sick with this bacterial infection. The infection was treated with antibiotics. Sal seemed to get well, but in a few weeks, she was sick again. How can this be explained using natural selection?
A The antibiotics were ineffective to this strain of bacteria.
B The stronger, more resistant bacteria survived the antibiotics and reproduced.
C The antibiotics did not kill the bacteria; it only forced them to be dormant.
D Antibiotics will only kill a portion of the bacteria, no matter how much medicine Sal takes.
B. The stronger, more resistant bacteria survived the antibiotics and reproduced.
This can be explained by natural selection because the bacteria that were naturally more resistant to the antibiotics were able to survive and reproduce, passing on their resistance to future generations. Over time, this could lead to the development of a strain of bacteria that is completely resistant to the antibiotics being used.