Hemimetabolism

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hemimetabolism or hemimetaboly, also called incomplete metamorphosis, is a term used to describe the mode of development of certain insects that includes three distinct stages: the egg, nymph, and the adult stage, or imago. These groups go through gradual changes; there is no pupal stage. The nymph often somewhat resemble the adult stage but lacking wings and functional reproductive organs.In biology, a nymph is the immature form of some invertebrates, particularly insects, which undergoes in gradual metamorphosis (hemimetabolism) before reaching its adult stage. Unlike a typical larva, a nymph's overall form already resembles that of the adult. In addition, while a nymph moults it never enters a pupal stage. Instead, the final moult results in an adult insect.