Single shield of which of the following is an exalbuminous seed ?

Options

A. Coleorhiza
B. Coleoptile
C. Castor seed
D. Pea seed

Answer

To solve the question regarding which seed is an exalbuminous seed, we need to understand the definitions and characteristics of albuminous and exalbuminous seeds.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Albuminous Seed**: These seeds have a significant amount of endosperm (the stored food) in addition to the cotyledons. The endosperm is the tissue that provides nourishment to the developing embryo.
- **Exalbuminous Seed**: These seeds have little to no endosperm at maturity, and the cotyledons are the main source of stored food.

2. **Identify the Options**:
- The options given are:
1. Cholerizer
2. Choleoctyl
3. Castor Seed
4. Pea

3. **Analyze Each Option**:
- **Cholerizer**: This is not a recognized term in seed classification.
- **Choleoctyl**: This term also does not correspond to any known seed classification.
- **Castor Seed**: Castor seeds are known to be albuminous because they contain a significant amount of endosperm.
- **Pea**: Peas are classified as exalbuminous seeds because they rely on their cotyledons for stored food rather than having a large endosperm.

4. **Conclusion**:
- Based on the definitions and the analysis of the options, the correct answer is **Pea** as it is an exalbuminous seed.

### Final Answer:
The single shield of which of the following is an exalbuminous seed? **Pea**.