Metamorphosis is the evolution of an animal during its life cycle. It refers to the changes of form insects go through in their life cycle from egg to immature stages to adult. They grow from the larval stage to the pupal stage and then to the reproductive adult stage. Thus it is a marked and more or less abrupt developmental change in the form or structure of an animal like a butterfly or a frog. Metamorphosis therefore can be defined as the cycle of change. It is the stages of a life cycle. Some of the insects or animals experience complete metamorphosis that consists of four stages where the egg turns into larva and then pupa and finally adult. Some other animals go through incomplete metamorphosis which has only three stages i.e. From the egg to nymph and then the adult. Aquatic animals usually go through incomplete metamorphosis. Butterflies undergo complete metamorphosis. There are two types of metamorphosis in insects, hemimetabolism and holometabolism.
