Which among the following is a characteristic of pea and bean?

Options

A. Monoadelphous stamens
B. Marginal placentation
C. Twisted aestivation
D. Endospermic seed

Answer

To determine the characteristic shared by both pea and bean plants, we can follow these steps:

### Step 1: Identify the Family
Both pea and bean plants belong to the **Fabaceae family**, also known as the legume family. This family is characterized by specific traits that are common among its members.

**Hint:** Look for common family traits in plants to narrow down shared characteristics.

### Step 2: Examine the Stamen Arrangement
In flowering plants, the arrangement of stamens can vary. Pea and bean plants exhibit **diadelphous stamens**, which means that the stamens are arranged in two groups: typically 9 fused together and 1 separate. This is different from monadelphous stamens, which consist of a single group.

**Hint:** Compare the stamen arrangements to identify which is common in both plants.

### Step 3: Analyze Placentation
**Marginal placentation** is a characteristic found in both pea and bean plants. In this type of placentation, the ovules are attached along the margin of the ovary, which is a defining feature of the Fabaceae family.

**Hint:** Consider how ovules are arranged in the ovary to determine placentation types.

### Step 4: Review Estivation
Estivation refers to the arrangement of floral parts in a bud. Pea and bean plants show **vexillary estivation**, which is a specific type of arrangement. This is not the same as twisted estivation, which is not characteristic of these plants.

**Hint:** Focus on floral arrangements to differentiate between types of estivation.

### Step 5: Assess Seed Type
Pea and bean seeds are classified as **non-endospermic seeds**, meaning that the endosperm is absorbed during seed development. This is an important distinction from endospermic seeds, which retain the endosperm.

**Hint:** Identify the type of seeds to understand their developmental characteristics.

### Conclusion
The characteristic that is common to both pea and bean plants is **marginal placentation**. This trait is significant and shared among members of the Fabaceae family.

**Final Answer:** Marginal placentation is a characteristic of both pea and bean plants.