Which life cycle stage is included in incomplete metamorphosis?

• A. Egg with direct development
• B. Pupa
• C. Larva
• D. Nymph

Answer: (D)

Verified step by step guidance

1. Understand the concept of incomplete metamorphosis: Incomplete metamorphosis is a type of development in certain insects where the life cycle includes three main stages—egg, nymph, and adult—without a pupal stage.
2. Compare incomplete metamorphosis to complete metamorphosis: Complete metamorphosis includes four stages—egg, larva, pupa, and adult. In incomplete metamorphosis, the larva and pupa stages are absent, and the nymph stage is present instead.
3. Define the nymph stage: The nymph is an immature form of the insect that resembles the adult but is smaller and lacks fully developed wings or reproductive structures. It undergoes gradual changes as it grows into the adult form.
4. Eliminate incorrect options: The 'pupa' stage is part of complete metamorphosis, not incomplete metamorphosis. The 'larva' stage is also part of complete metamorphosis. 'Egg with direct development' is not specific to incomplete metamorphosis and does not describe the nymph stage.
5. Conclude that the correct answer is 'Nymph,' as it is the life cycle stage unique to incomplete metamorphosis and represents the immature form of the insect before becoming an adult.