Question

Why did the resistant bacteria become more common?


They wanted to survive more.


They had a variation that increased their fitness, while the non resistant bacteria died off.


The non resistant bacteria migrated away

Answers

GPT-4o mini
The more accurate explanation for why resistant bacteria became more common is:

**They had a variation that increased their fitness, while the non-resistant bacteria died off.**

This phenomenon is known as natural selection, where bacteria that possess genetic traits (such as antibiotic resistance) that allow them to survive in the presence of antibiotics are more likely to survive and reproduce. Over time, these resistant bacteria proliferate while non-resistant strains may be killed off by antibiotic treatments.

The other explanations provided (wanting to survive and migrating away) do not accurately reflect the biological processes involved in the development of antibiotic resistance. Bacteria do not consciously "want" to survive or migrate; rather, genetic variations that confer resistance naturally increase the likelihood of survival under selective pressures such as antibiotic use.