Question

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

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

Answer 1

Answer: (B)

• The cockroach life cycle actually has three developmental stages.
• These stages are known as the egg, the nymph and the adult stages.
• Each time the molting process is completed the cockroach will get bigger, change in colour and look more like an adult cockroach.
• The nymph stage of the cockroach life cycle can take anywhere from a month and a half to several years, depending on the environment.
• After the final moult the nymph bears wings. When the cockroach reaches its adult size it will not moult again.
• Cockroaches complete their transformation into adulthood with a pair of wings - forewings and hind wings. So, the correct answer is option C.