Missouri FFA Entomology CDE Practice Exam

Which insect is a beetle with complete metamorphosis?

Water Strider Western Corn Rootworm White-Lined Sphinx Moth Yellowjacket

Correct Answer:

Western Corn Rootworm

Explanation:

Complete metamorphosis means the insect goes through four life stages—egg, larva, pupa, and adult—with the larval form usually looking very different from the adult. Beetles, in the order Coleoptera, all undergo this four-stage development. The Western Corn Rootworm is a beetle, so it follows that complete metamorphosis. The water strider isn’t a beetle; it’s a true bug (Hemiptera) and has incomplete metamorphosis (egg, nymph, adult). The white-lined sphinx moth is a Lepidoptera and also undergoes complete metamorphosis, and the yellowjacket is a Hymenoptera, which also has complete metamorphosis—neither is a beetle, though.

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