The rise of methicillin-resistant Staphylococcus aureus (MRSA)can be considered to be an example of artificial selection because
A) humans purposefully raise MRSA in large fermenters in an attempt to make the bacteria ever-more resistant.
B) S. aureus is cultivated by humans to replenish the soil with nutrients.
C) humans synthesize methicillin and create environments in which bacteria frequently come into contact with methicillin.
D) Humans are becoming resistant to bacteria by taking methicillin.

Question

Quizplus · Accepted Answer

Methicillin was synthesized by humans and is frequently used in clinical settings, creating an environment for S. aureus to become resistant through natural selection. Over time, the surviving bacteria reproduce and pass on their resistance genes, resulting in the evolution of MRSA. Therefore, the rise of MRSA can be considered an example of artificial selection indirectly caused by human actions.

The Rise of Methicillin-Resistant Staphylococcus Aureus (MRSA)can Be Considered to Be