Question

What external changes are visible after the last moult of a cockroach nymph _________________.

• A. Labium develops
• B. Mandible becomes harder
• C. Anal cerci develop
• D. Both fore wings and hind wings develop

Answer 1

The correct option is D Both fore wings and hind wings develop

In cockroach, development is pauro metabolous. The nymph grows by moulting about 13 times to reach the adult form. The next to last nymphal stage has wings. Anal cerci are a pair of jointed filamentous structures in the 10th segment of both sexes. The labium is a lower lip and a pair of mandibles are present in mouthparts of a cockroach.

So, the correct answer is 'Both fore wings and hind wings develop'.