Question

evidence for evolution: direct observation
antibiotics are a type of drug that kill bacteria. some bacteria, e.g. mrsa, have mutated to have resistance to certain antibiotics
the diagram below shows a colony of bacteria - the green bacterium has a mutation that makes it resistant to an antibiotic. drag and drop bacteria from the first petri dish to show what would happen when this antibiotic is used and how this leads to the rapid evolution of the population
original colony
antibiotic used
reproduction of antibiotic resistant bacteria

Explanation:

When the antibiotic is used, non - resistant bacteria in the original colony are killed. The green, antibiotic - resistant bacterium survives due to its mutation. It then reproduces, leading to a population of antibiotic - resistant bacteria, which is an example of natural selection and rapid evolution in bacteria.

Answer:

Drag only the green (antibiotic - resistant) bacterium from the first petri dish to the subsequent petri dishes to show its survival and reproduction after the antibiotic is used.