Which one of the following is not an example of adaptive radiation?

Key Points

• Adaptive radiation is a process of evolution of different species in a given geographical area. 
• It starts from an ancestral stock and radiating or moving to other habitats. 
• It was first shown by Darwin while he studied the species of finches in the Galapagos islands.
• There were several species of finches that had diverged from the original seed-eating species.
• Competing with the same resources on the island allowed them to adopt with new beak features that reduced competition for survival.
• The feeding habit of Darwin's finches ranged from seeds to insects and many more.
• Similar example can be given for Australian marsupials and Australian placental mammals, that evolved within the continental island from an ancestral stock.
• The Australian placental mammals also show similarities with a corresponding marsupial. E.g.-Anteater and Numbat.

Additional Information

• Moths in England exemplify natural selection.
• A change was observed in the population of peppermoths of England after industrialization.
• Before industrialization, white-winged moths were more prevalent on the trees that were covered with whitish lichen, which grew in the absence of pollution.
• Post-industrialization, the trees became covered with soot and smoke, exposing the white-winged moths to predators.
• Here, the dark-winged or melanized moths survived better and hence became prevalent.
• In rural areas, however, the white-winged moths prevailed.
• This shows a directional selection in favour of the dark-winged moths in industrial are.