Mouth parts of insects show divergent evolution.

Mouthparts of insects are an example of homologous organs since in different insects they are variously modified to take in different types of food but are made up of the same parts - labrum, labium, a pair of mandibles, a pair of maxillae, and hypopharynx. The evolution which takes place in different directions is an example of adaptive radiation or divergent evolution, which means that when two or more populations are exposed to different food resources, they diverge from a common ancestor. The mouthparts are lapping type in bees and wasps. sponging type in the housefly, piercing and sucking type in mosquitoes, and siphoning type in fleas.