What distinguishes gradual metamorphosis from complete metamorphosis?

• A. Larvae resemble adults but have wings
• B. Pupae are not involved in development
• C. Adults look nothing like the young
• D. Nymphs resemble adults but lack wings

Answer: (D)

The difference lies in how the immature forms relate to the adults and whether a pupal stage is involved. In gradual (incomplete) metamorphosis, the young—called nymphs—look like smaller versions of the adult and typically lack fully developed wings. They molt gradually, gaining more adult features with each molt until they become adults. In complete metamorphosis, there is a distinct larval stage that looks very different from the adult, and a pupal stage where transformation occurs; the adult’s features, including wings if the species has them, come after this pupal period.

That description—nymphs resembling adults but lacking wings—best captures gradual metamorphosis. The other options either describe features of complete metamorphosis (larvae that look nothing like the adult, or the involvement of a pupal stage) or present an incorrect scenario (larvae with wings).