The boat shaped sternum of female cockroach forms ______of genital pouch 

Options

A. roof, side walls
B. floor and side walls
C. roof, floor, sidewalls
D. none

Answer

To answer the question regarding the boat-shaped sternum of the female cockroach and its role in forming the genital pouch, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The question refers to the "boat-shaped sternum" of the female cockroach. This structure is specifically the 7th sternum.

2. **Understand the Function**: The 7th sternum plays a crucial role in the formation of the genital pouch, which is also known as the brood pouch.

3. **Components of the Genital Pouch**: The genital pouch is formed not only by the 7th sternum but also involves the 8th and 9th sternum.

4. **Determine the Contribution of the 7th Sternum**: The 7th sternum contributes to the formation of the floor and sidewalls of the genital pouch.

5. **Select the Correct Answer**: Based on the information that the 7th sternum helps form the floor and sidewalls of the genital pouch, the correct answer to the question is "floor and sidewalls."

### Final Answer:
The boat-shaped sternum of the female cockroach forms **floor and sidewalls** of the genital pouch.

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