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Incomplete metamorphosis: a change in body form with three stages: egg, nymph, and adult.
Nymph: young stage of insects that undergo a partial metamorphosis; similar to the adult except that wings are not fully developed.
Insects that go through three stages of change in their life cycle have an incomplete metamorphosis while complete metamorphosis has four stages.
The first stage of incomplete metamorphosis is the egg. During this time, the insect will hatch into a form called a nymph.
The nymph is basically a small version of the adult insect. This is very similar to how a child looks like his or her parents. Nymphs usually have a thin exoskeleton and no wings. They eat the same food as their parents and live in the same place. As insect nymphs grow larger, their exoskeleton becomes too tight and they must replace it.
Once a nymph outgrows its exoskeleton it will go through a process called molting, in which it leaves the old “skin” or exoskeleton behind. The new “skin” will harden and become the new exoskeleton. This will happen many times until the insect finally becomes the size of an adult.
Insects that have an incomplete metamorphosis life cycle include true bugs, grasshoppers, cockroaches, termites, praying mantises, crickets, and lice.
Dr. Biology. (2011, April 29). Incomplete Metamorphosis. ASU - Ask A Biologist. Retrieved September 20, 2018 from https://askabiologist.asu.edu/incomplete-metamorphosis
Dr. Biology. "Incomplete Metamorphosis". ASU - Ask A Biologist. 29 April, 2011. https://askabiologist.asu.edu/incomplete-metamorphosis
Dr. Biology. "Incomplete Metamorphosis". ASU - Ask A Biologist. 29 Apr 2011. ASU - Ask A Biologist, Web. 20 Sep 2018. https://askabiologist.asu.edu/incomplete-metamorphosis
Cockroaches go through incomplete metamorphosis, where the young look like miniature versions of the adults.