ametabolism

Ametabolism is a type of growth or life cycle in insects in which there is slight or no metamorphosis, only a gradual increase in size. It is present only in primitive wingless insects: the orders Archaeognatha and Zygentoma.McGavin, George C. Essential Entomology: An Order-by-Order Introduction. Oxford: Oxford University Press, 2001. pp. 20.{{cite book|last=Triplehorn|first=Charles A|title=Borror and DeLong's introduction to the study of insects.|year=2005|publisher=Thomson, Brooks/Cole|location=Australia|isbn=9780030968358|edition=7th|author2=Johnson, Norman F}}