Why is widespread resistance to tuberculosis (TB) not likely to evolve any time soon?
A) Only a small percentage of people who are nonresistant to the bacterium will become infected and die from TB, so the variant will stay in the population.
B) TB is highly fatal, so those who are nonresistant will die quickly.
C) Humans are no longer evolving, so the population cannot develop widespread resistance.
D) It would be too expensive to genetically engineer people to give them the resistance gene.

Question

Quizplus · Accepted Answer

Only a small percentage of people who are nonresistant to the bacterium will become infected and die from TB, so the variant will stay in the population. This means that there is no significant pressure for widespread resistance to evolve. Additionally, even if resistance did evolve, it would take a long time as the bacterial population evolves in response.

Why Is Widespread Resistance to Tuberculosis (TB) Not Likely to Evolve