Ligule occurs on the leaf of

Options

A. Barley
B. Oat
C. Rice
D. All the above.

Answer

To answer the question "Ligule occurs on the leaf of," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Ligule**:
- The ligule is a small, often membranous structure found at the junction of the leaf blade and the leaf sheath. It can be transparent or hair-like in appearance.

2. **Identify the Plant Families**:
- Ligules are characteristic features of plants in the Poaceae family, commonly known as the grass family. This family includes many important cereal crops.

3. **Recognize the Monocot Characteristics**:
- The Poaceae family belongs to the monocots, which are one of the two major groups of flowering plants. Monocots typically have parallel leaf venation and flower parts in multiples of three.

4. **List the Options**:
- The options provided are barley, oat, and rice. All these plants are known to belong to the Poaceae family.

5. **Conclusion**:
- Since all the options (barley, oat, and rice) are members of the Poaceae family, they all possess ligules on their leaves. Therefore, the correct answer is "all of the above."

### Final Answer:
Ligule occurs on the leaf of barley, oat, and rice, which are all members of the Poaceae family.

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