A microbiologist investigates the effects of the antibiotic colistin on a population of Pseudomonas aeruginosa bacteria. At the start, the culture contains a mixture of colistin-resistant and colistin-sensitive bacteria.
They apply colistin twice, allowing an incubation period in between for replication to occur. The results of the investigation are shown in the flow diagram below.
a.[3]
Complete the row for Final Culture in the table using the information from the diagram.
b.[1]
Which evolutionary process does the researcher's investigation demonstrate?
c.[3]
Explain why the results of this investigation are important for medical professionals administering antibiotic treatments to patients.