Question

question 23 of 25
what is the environmental pressure in the case of antibiotic resistance?
○ the growth rate of the bacteria
○ the relative fitness of different bacteria
○ how strong or weak the bacterial cell walls are
○ the presence or absence of antibiotics in the environment
○ the temperature of the environment

Explanation:

Environmental pressure refers to external factors that drive natural selection. In antibiotic resistance, antibiotics in the environment select for resistant bacteria (they survive/reproduce) and eliminate non-resistant ones, making this the key pressure. Other options describe bacterial traits or conditions not acting as the selective pressure itself.

Answer:

the presence or absence of antibiotics in the environment