The female genital aperture in Earthworm is present ventrally on the segment

Options

A. 10th
B. 12th
C. 14th
D. 18th

Answer

To determine the segment where the female genital aperture in an earthworm is located, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Anatomy of the Earthworm**:
- Earthworms have a segmented body. Each segment has specific reproductive structures.

2. **Identify the Location of Ovaries**:
- The ovaries are located at the inter-segmental septum between the 12th and 13th segments. This is crucial because the female reproductive structures are associated with these segments.

3. **Locate the Ovarian Funnels**:
- The ovarian funnels are situated beneath the ovaries. These funnels are important for the passage of eggs.

4. **Trace the Oviducts**:
- The ovarian funnels lead into the oviducts. The oviducts are responsible for transporting the eggs from the ovaries.

5. **Determine the Opening of the Oviducts**:
- The oviducts from both sides join together and open on the ventral side of the earthworm.

6. **Identify the Segment of the Female Genital Pore**:
- The single median female genital pore, where the oviducts open, is located on the 14th segment of the earthworm.

7. **Conclusion**:
- Therefore, the female genital aperture in the earthworm is present ventrally on the 14th segment.

### Final Answer:
The female genital aperture in the earthworm is present ventrally on the **14th segment**.

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