Question

what is the evolutionary process that causes antibiotic-resistant bacteria to increase and antibiotic-sensitive bacteria to decrease in an environment where antibiotics are present?
o antibiotic selection
o bacterial selection
o environmental selection
o evolutionary selection
o natural selection

Explanation:

Natural selection is the evolutionary process where organisms better adapted to their environment (here, antibiotic - containing) survive and reproduce more. Antibiotic - resistant bacteria have a trait (resistance) that allows them to survive in the presence of antibiotics, while sensitive ones die. This leads to an increase in resistant bacteria over time. The other terms like "antibiotic selection", "bacterial selection", "environmental selection", and "evolutionary selection" are not the standard, widely - accepted terms for this biological evolutionary process.

Answer:

natural selection