Question

In the female cockroach the anterior wall, roof and floor of genital pouch are formed respectively by the following abdominal sterna of

• A. 7${}^{th}$, 8${}^{th}and9$^{th}$segments
• B. 8${}^{th}$, 9${}^{th}$ and 9${}^{th}$ segments
• C. 9${}^{th}$, 8${}^{th}$ and 7${}^{th}$ segments
• D. 8${}^{th}$, 9${}^{th}$ and 7${}^{th}$ segments

Answer 1

The correct option is A 7${}^{th}$, 8${}^{th}and9$^{th}$segments

In the female cockroach the genital pouch is formed by the 7${}^{th}$, 8${}^{th}$ and 9${}^{th}$ abdominal sterna. The sternum of the 7${}^{th}$ segment is boat shaped which forms the floor and side walls of the genital pouch. The sterna of the eighth and ninth segments constitute the anterior wall and the roof of the genital pouch, respectively. The genital pouch has two chambers, the anterior gynatrium or genital chamber and the posterior vestibulum or oothecal.

So, the correct option is A.