Which insect is Diptera with complete metamorphosis and sucking mouthparts?

Which insect is Diptera with complete metamorphosis and sucking mouthparts?

• A. Fruit Fly
• B. German Cockroach
• C. Giant Water Bug
• D. Green Lacewing

Answer: (A)

Diptera are two-winged flies that undergo complete metamorphosis, with life stages of egg, larva, pupa, and adult. A fruit fly fits this group precisely: it is a small two-winged fly that develops through all four life stages, and its mouthparts are adapted to liquid feeding through a sucking/sponging mechanism. The other insects listed belong to different orders and have different development and mouthpart types—German cockroaches (order Blattodea) have incomplete metamorphosis and chewing mouthparts, giant water bugs (order Hemiptera) have piercing-sucking mouthparts, and green lacewings (order Neuroptera) have chewing mouthparts.

Diptera are two-winged flies that undergo complete metamorphosis, with life stages of egg, larva, pupa, and adult. A fruit fly fits this group precisely: it is a small two-winged fly that develops through all four life stages, and its mouthparts are adapted to liquid feeding through a sucking/sponging mechanism. The other insects listed belong to different orders and have different development and mouthpart types—German cockroaches (order Blattodea) have incomplete metamorphosis and chewing mouthparts, giant water bugs (order Hemiptera) have piercing-sucking mouthparts, and green lacewings (order Neuroptera) have chewing mouthparts.