Antibiotic resistance evolves in bacteria because ______.
A) the presence of antibiotics favors bacteria that already have genes for resistance
B) farmers do not use enough antibiotics in animal feed
C) the antibiotics create resistance genes in bacteria
D) none of the above

Question

Quizplus · Accepted Answer

Antibiotic resistance evolves in bacteria because the presence of antibiotics favors bacteria that already have genes for resistance. When antibiotics are used, they kill susceptible bacteria, allowing those with resistance genes to survive and reproduce. Over time, this can result in the evolution of antibiotic-resistant strains of bacteria. Therefore, the best choice is A. Farmers not using enough antibiotics in animal feed or antibiotics creating resistance genes in bacteria are not accurate explanations for the evolution of antibiotic resistance.

Antibiotic Resistance Evolves in Bacteria Because ______