Which organism has the life cycle Egg -> Larva -> Pupa -> Adult?

• A. Nematode
• B. Fish
• C. Insect
• D. Plant

Answer: (C)

This pattern represents complete metamorphosis, where development goes from egg to larva, then to a pupal stage, and finally to an adult. The pupal stage is a non-feeding transitional period during which the organism reorganizes its tissues and organs to become an adult. Many insects undergo this four-stage sequence—think of butterflies, moths, beetles, bees, and flies—where the larva and adult look very different and have different lifestyles. Nematodes don’t have a pupal stage, proceeding from egg to larva to adult more directly. Fish eggs hatch into immature fish and grow to the adult form without a pupal phase, and plants have life cycles that involve different generations rather than a larva-to-pupa transformation. So, the organism that fits Egg → Larva → Pupa → Adult is an insect.