Question

Use of antibiotics has dramatically altered the course of evolution, to the point that what is now true?

A. Bacteria have become more vulnerable to antibiotics
B. Antibiotic resistance is widespread among bacteria
C. Antibiotics have become less effective over time
D. Bacteria have become extinct

Answer 1

Antibiotic resistance is widespread among bacteria due to the excessive use of antibiotics, which has led to the evolution of resistant strains rendering antibiotics less effective.

Step-by-step explanation:

The use of antibiotics has dramatically altered the course of evolution in bacteria. The correct statement in this context is that B. Antibiotic resistance is widespread among bacteria. Due to the excessive use of antibiotics, resistant forms of bacteria have been naturally selected. This has happened because antibiotics kill most of the susceptible bacteria, leaving behind those that have mutations allowing them to survive. These resistant bacteria then reproduce, leading to a higher proportion of resistant forms in the population. As a result, antibiotics have become less effective over time, making it difficult to combat infections that were once easily treatable.