What type of placentation is seen in Sweet Pea?

Options

A. Free central
B. Marginal
C. Basal
D. Axile

Answer

To determine the type of placentation seen in Sweet Pea, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Placentation**:
Placentation refers to the arrangement of ovules within the ovary of a flower. Different types of placentation can be identified based on how the ovules are positioned.

**Hint**: Remember that placentation is all about the arrangement of ovules.

2. **Identify the Types of Placentation**:
There are five main types of placentation:
- Marginal
- Axile
- Parietal
- Free Central
- Basal

**Hint**: Familiarize yourself with the definitions and examples of each type of placentation.

3. **Analyze Each Type**:
- **Marginal**: Ovules are arranged along the margin of a single ovary.
- **Axile**: Ovules are arranged in the center of a multi-locular ovary.
- **Parietal**: Ovules are attached to the walls of the ovary.
- **Free Central**: Ovules are located in the center but not attached to the ovary walls.
- **Basal**: Only one ovule is present at the base of the ovary.

**Hint**: Visualize or sketch each type to better understand their arrangements.

4. **Consider the Sweet Pea**:
The Sweet Pea (Lathyrus odoratus) is known for its specific type of placentation.

**Hint**: Think about where the ovules are located in the Sweet Pea flower.

5. **Determine the Correct Type**:
After analyzing the options and understanding the characteristics of Sweet Pea, it is established that Sweet Pea exhibits **marginal placentation**. This means the ovules are arranged along the margin of the ovary.

**Hint**: Recall that the term "marginal" relates to the edge or border, which is key in identifying this type.

### Final Answer:
The type of placentation seen in Sweet Pea is **Marginal**.