Which term best describes the juvenile aquatic stage of dragonflies and damselflies?

Which term best describes the juvenile aquatic stage of dragonflies and damselflies?

• A. Nymph
• B. Pupa
• C. Larva
• D. Caterpillar

Answer: (A)

Dragonflies and damselflies undergo incomplete metamorphosis, so their juvenile stage that lives underwater is an aquatic nymph. This immature form, often called a naiad, grows by molts and only later becomes a winged adult. Among the terms given, the one that best names this stage is the nymph, since it describes an underwater juvenile without a pupal stage. The other terms don’t fit: a pupa implies complete metamorphosis with a pupal phase, a larva is a general term used for many insects but is not the standard label for odonate development, and a caterpillar is specific to butterflies and moths.

Dragonflies and damselflies undergo incomplete metamorphosis, so their juvenile stage that lives underwater is an aquatic nymph. This immature form, often called a naiad, grows by molts and only later becomes a winged adult. Among the terms given, the one that best names this stage is the nymph, since it describes an underwater juvenile without a pupal stage. The other terms don’t fit: a pupa implies complete metamorphosis with a pupal phase, a larva is a general term used for many insects but is not the standard label for odonate development, and a caterpillar is specific to butterflies and moths.