An archegonium of Riccia has

Options

A. 4 neck canal cells, 1 venter canal cell and one oosphere
B. 4 neck canal cells, 2 venter canal cells one oosphere
C. 4 neck canal cells, one venter canal cell and two oospheres
D. 6 neck canal cells, 2 venter canal cells and one oosphere.

Answer

To answer the question regarding the structure of an archegonium of Riccia, we can break down the information step by step:

### Step-by-Step Solution:

1. **Understanding Riccia**:
- Riccia is a genus of liverworts, which are non-vascular plants classified under the group known as bryophytes.

2. **Structure of Archegonium**:
- The archegonium is a female reproductive structure in bryophytes. In Riccia, the archegonium has a distinct shape and structure.

3. **Shape and Parts of Archegonium**:
- The mature archegonium of Riccia is flask-shaped. It consists of two main parts:
- **Venter**: The swollen base that contains the egg cell.
- **Neck**: A long, slender portion above the venter.

4. **Components Inside the Venter**:
- Inside the venter, there is:
- **One Oosphere**: This is the large egg cell located in the ventral cavity.
- **One Ventricanal Cell**: This is a smaller cell situated above the oosphere.

5. **Neck Canal Cells**:
- The neck of the archegonium is surrounded by **4 neck canal cells**. These cells are arranged in vertical rows and play a role in the fertilization process.

6. **Conclusion**:
- Based on the structure and components of the archegonium of Riccia, the correct answer is:
- **4 neck canal cells, 1 ventricanal cell, and 1 oosphere**.

### Final Answer:
The archegonium of Riccia has **4 neck canal cells, 1 ventricanal cell, and 1 oosphere**.