Question

Industrial melanism in the peppered moth is significant because it demonstrates:

Options

• A selection of resistant genotypes

• Balanced polymorphism

• Rapid natural selection in microorganisms

• Environmental selection acting on colour variation

Answer 1

Industrial melanism demonstrates environmental selection acting on colour variation. The other options correspond to different examples: DDT resistance (selection of resistant genotypes), sickle-cell anaemia (balanced polymorphism), and antibiotic resistance (rapid natural selection in microorganisms).