The two oviducts unite and open ventrally on_________ segment by a female genital pore.

Options

A. 13th
B. 14th
C. 15th
D. 16th

Answer

To answer the question about which segment the two oviducts unite and open ventrally on by a female genital pore, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Oviducts**: The oviducts are reproductive structures in female organisms that transport eggs from the ovaries to the outside of the body or to the uterus.

2. **Identifying the Segment**: In many organisms, including annelids like earthworms, the reproductive structures are located in specific segments of the body.

3. **Location of Ovaries**: The ovaries are typically attached to the intersegmental septum and are found in segments 6 to 9. This indicates that the reproductive system is located in the anterior part of the body.

4. **Formation of Oviducts**: The oviducts are formed from the ovarian funnels, which are located below the ovaries. These funnels lead into the oviducts.

5. **Joining of Oviducts**: The two oviducts, after forming from the ovarian funnels, will unite and open ventrally.

6. **Identifying the Female Genital Pore**: The united oviducts open as a single median female genital pore.

7. **Determining the Segment of the Female Genital Pore**: According to the information, the female genital pore is located in the 14th segment of the organism.

### Final Answer:
The two oviducts unite and open ventrally on the **14th segment** by a female genital pore.

---