Which insect group undergoes complete metamorphosis?

Which insect group undergoes complete metamorphosis?

• A. Beetles
• B. Spiders
• C. Nematodes
• D. Aphids

Answer: (A)

Complete metamorphosis, or holometabolism, means the insect goes through four distinct life stages: egg, larva, pupa, and adult. The larva and adult usually look very different and often have different lifestyles, with transformation occurring mainly during the pupal stage. Beetles fit this pattern: eggs hatch into larvae (grub-like), then become pupae, during which their bodies are remodeled into the adult beetle form. Spiders aren’t insects and don’t undergo this four-stage transformation. Nematodes are worms with simpler development, and aphids go through stages that resemble the adults (nymphs) without a pupal stage. So the group that undergoes complete metamorphosis is beetles.