Topic: Frog: digestive, circulatory, respiratory, nervous and reproductive systems· Structural Organisation in Animals and Plants

Which of the following features is used to identify a male cockroach from a female cockroach ?

1. Presence of a boat shaped sternum on the 9\(^{th}\) abdominal segment

2. Forewings with darker tegmina

3. Presence of caudal styles

4. Presence of anal cerci

Doubtly Asked 30 Oct 2026 NEET UG 2018 neet Save WhatsApp Report

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Answer: 3. Presence of caudal styles

Key idea: Male and female cockroaches differ in the last abdominal segments.

Males have a pair of thread-like caudal (anal) styles on the 9th sternum. These are absent in females. Both sexes have anal cerci. The boat-shaped sternum belongs to the female, and wings do not distinguish the sexes.

Answer: option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following features is used to identify a male cockroach from a female cockroach ?

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