The wheat grain has an embryo with one large, shieldshaped cotyledon known as :-

Options

A. Coleoptile
B. Epiblast
C. Coleorrhiza
D. Scutellum

Answer

To answer the question regarding the wheat grain's embryo with one large, shield-shaped cotyledon, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The question states that the wheat grain has an embryo with a specific type of cotyledon. We need to identify the correct term for this structure.

2. **Understand Cotyledons**: Cotyledons are the first leaves that appear from a seed. In the case of wheat, we are looking for a term that describes a single, large, shield-shaped cotyledon.

3. **Review Options**: The options provided are:
- A) Coleoptile
- B) Epiblast
- C) Coleorhiza
- D) Scutellum

4. **Evaluate Each Option**:
- **Coleoptile**: This is a protective sheath covering the emerging shoot in grasses, but it is not the cotyledon itself. Thus, this option is incorrect.
- **Epiblast**: This term refers to a layer in the embryo but is not related to wheat grain cotyledons. Therefore, this option is incorrect.
- **Coleorhiza**: This is a protective covering for the radicle (embryonic root) in grasses, not the cotyledon. Hence, this option is also incorrect.
- **Scutellum**: This is the correct term for the large, shield-shaped cotyledon found in the embryo of wheat grains.

5. **Conclusion**: Based on the evaluation of the options, the correct answer is **Scutellum**.

### Final Answer:
The wheat grain has an embryo with one large, shield-shaped cotyledon known as **Scutellum**.

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