Question

Apply Research has shown that if a prescribed dose of an antibiotic is not taken completely , some bacteria might not be killed and the disease might return. How does natural selection explain this phenomenon?​

Answer 1

Through natural selection the disease gain immunity to the antibiotic.

Step-by-step explanation:

As the antibiotic kills off the members of the population that are not resistant, leaving only the resistant members. These members then reproduce, passing the immunity to their offspring, causing the population to become immune.