A single cotyledon in grass family which is situated towards one side of the embryonal axis is called as

Options

A. Epicotyl
B. Coleoptile
C. Hypocotyl
D. Scutellum

Answer

To answer the question regarding the single cotyledon in the grass family that is situated towards one side of the embryonal axis, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Plant Family**: The question refers to the grass family, which is known scientifically as the Poaceae family. Members of this family are classified as monocots.

2. **Understand Cotyledons**: In monocot plants, there is typically one cotyledon. The cotyledon is the first leaf or leaves that appear from a germinating seed.

3. **Locate the Cotyledon**: In the case of monocots like grasses, the single cotyledon is not centrally located but is instead situated towards one side of the embryonal axis.

4. **Identify the Correct Term**: The specific term used to describe the single cotyledon in monocots, particularly in the grass family, is "scutellum".

5. **Eliminate Other Options**:
- **Epicotyl**: This is the part of the embryonal axis above the cotyledon in dicots, so it does not apply here.
- **Coliopetile**: This refers to a protective sheath covering the emerging shoot in monocots, which is not the same as a cotyledon.
- **Hypocotyl**: This is the part of the embryonal axis below the cotyledon in dicots, thus also not applicable.

6. **Conclusion**: Based on the understanding of monocot structure and the definitions of the terms, the correct answer to the question is "scutellum".

### Final Answer:
The single cotyledon in the grass family which is situated towards one side of the embryonal axis is called **scutellum**.

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