A dicot exalbuminous seed is

Options

A. Wheat seed
B. Maize seed
C. Castor seed
D. Pea seed

Answer

To determine which of the given seeds is a dicot exalbuminous seed, we need to understand the definitions and characteristics of the types of seeds mentioned.

### Step-by-Step Solution:

1. **Understanding Seed Types**:
- Seeds can be classified as **albuminous (endospermic)** or **exalbuminous (non-endospermic)**.
- **Albuminous seeds** contain a significant amount of endosperm, which is the tissue that provides nourishment to the developing embryo.
- **Exalbuminous seeds** do not have a significant amount of endosperm; instead, the food reserves are stored in the cotyledons.

2. **Identifying Dicot Seeds**:
- Dicot seeds typically have **two cotyledons** and are usually exalbuminous.
- Examples of dicot seeds include **pea (Pisum sativum)** and **caster (Ricinus communis)**.
- However, caster seeds are known to have some endosperm, making them endospermic.

3. **Analyzing the Options**:
- **Wheat seed**: This is a monocot seed and is albuminous.
- **Maize seed**: This is also a monocot seed and is albuminous.
- **Castor seed**: This is a dicot seed but is endospermic.
- **Pea seed**: This is a dicot seed and is exalbuminous (non-endospermic).

4. **Conclusion**:
- Among the options provided, the only dicot exalbuminous seed is the **pea seed**.
- Therefore, the correct answer is **pea seed**.

### Final Answer:
The dicot exalbuminous seed is **pea seed**.

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