The arrangement of the ovules on the placenta developed from the central axis of the ovary is called

Options

A. Parietal placentation
B. Basal placentation
C. Marginal placentation
D. Axile placentation

Answer

To answer the question regarding the arrangement of ovules on the placenta developed from the central axis of the ovary, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Placenta in Plants**:
- The term "placenta" in botany refers to the part of the ovary where ovules are attached. It is crucial to know that the arrangement of ovules can vary based on how they are positioned within the ovary.

2. **Identifying the Types of Placentation**:
- There are several types of placentation: parietal, basal, marginal, and axial. Each type describes a different arrangement of ovules within the ovary.

3. **Defining Axial Placentation**:
- In axial placentation, the ovules are arranged along the central axis of the ovary. This means that the ovules are attached to a central column or structure within the ovary.

4. **Examples of Each Type**:
- **Parietal Placentation**: Ovules are attached to the walls of the ovary (e.g., mustard).
- **Basal Placentation**: Ovules are located at the base of the ovary (e.g., sunflower).
- **Marginal Placentation**: Ovules develop along the edge of the ovary (e.g., pea).
- **Axial Placentation**: Ovules develop on the central axis (e.g., tomato).

5. **Conclusion**:
- Since the question specifically asks for the arrangement of ovules on the placenta developed from the central axis of the ovary, the correct answer is **axial placentation**.

### Final Answer:
The arrangement of the ovules on the placenta developed from the central axis of the ovary is called **axial placentation**.