Question

normal bacterium dead bacterium resistant bacterium the overuse and misuse of antibiotics can also cause drug resistance. the overuse of antibiotics contributes to a faster rate of mutation, helping the bacteria to modify at a quicker rate. by the time newer vaccines or drugs are introduced, some bacteria have already developed resistance. misusing antibiotics, by not completing a prescribed course, contributes to the likelihood that more bacteria will become resistant. resistant bacteria make it harder and more expensive to treat infections. this is a major threat to public health. one of the newer approaches to prevent the spread of disease is by providing adequate nutrition, sanitation, and addressing environmental factors. antibiotic treatment can achieve a better outcome when two or more drugs are combined during treatment. new drugs and vaccines are also being developed to prevent and treat future infections. which process is responsible for the change to the bacteria population over time? natural selection genetic drift gene flow sexual selection

Explanation:

Antibiotics act as a selective pressure. Resistant bacteria survive and reproduce more, passing on resistance - related traits, which is natural selection.

Answer:

Natural selection