When the London underground (subway)system was built in the nineteenth century,mosquitoes moved into the tunnels and became adapted to biting the customers and small animals that inhabit the subway system.Like people,mosquitoes can freely enter and leave through the tunnel entrances.Recently,DNA analysis and attempts to cross-breed above-ground mosquitoes with underground mosquitoes indicate that there are now two different species.The underground insects are visibly larger.Which term best describes what has happened?

Question

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The adaptation of the mosquitoes to the underground subway system has led to the development of two different species that are distinct from one another. This is an example of sympatric speciation, which occurs when populations within the same geographical area diverge and become reproductively isolated. The visible differences in size further support the idea of genetic divergence leading to the formation of two separate species.

When the London Underground (Subway)system Was Built in the Nineteenth