External wing development is a trait of which insect group?

External wing development is a trait of which insect group?

• A. Endopterygotes
• B. Exopterygotes
• C. Paleopterygotes
• D. Apterygotes

Answer: (B)

External wing development means wings start forming on the outside of the body as wing pads that grow through molts, rather than forming inside the body and only becoming visible later. This pattern defines exopterygotes, insects that undergo incomplete metamorphosis and where the immature stages (nymphs) resemble small adults with visible wing buds that enlarge until the final molt reveals the wings. In contrast, endopterygotes form wings internally during larval or pupal stages and only emerge as fully formed wings after metamorphosis; apterygotes lack wings, and paleopterygotes are an older group term for winged insects whose wings are not foldable. So the trait of external wing development points to exopterygotes.

External wing development means wings start forming on the outside of the body as wing pads that grow through molts, rather than forming inside the body and only becoming visible later. This pattern defines exopterygotes, insects that undergo incomplete metamorphosis and where the immature stages (nymphs) resemble small adults with visible wing buds that enlarge until the final molt reveals the wings. In contrast, endopterygotes form wings internally during larval or pupal stages and only emerge as fully formed wings after metamorphosis; apterygotes lack wings, and paleopterygotes are an older group term for winged insects whose wings are not foldable. So the trait of external wing development points to exopterygotes.