Which of the following structures is unique to the seed of a monocot ?

Options

A. Coleoptiles
B. Radicle
C. Seed coat
D. Endosperm

Explanation

To determine which structure is unique to the seed of a monocot, we can analyze the options provided in the question. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Components of a Seed
A seed typically consists of three main parts:
- Seed coat: This protects the seed.
- Endosperm (or angiosperm): This provides nourishment to the embryo.
- Embryo: This is the developing plant.

### Step 2: Identify the Structures in Monocot Seeds
Monocots, or monocotyledons, are a group of flowering plants that have specific characteristics. In monocot seeds, the following structures are particularly notable:
- **Coleoptile**: A cylindrical structure that protects the shoot apex and the first leaf as it emerges from the soil.
- **Radicle**: The embryonic root that grows downwards to anchor the seed.
- **Endosperm**: A storage tissue that provides nutrients.

### Step 3: Focus on Unique Structures
Among the structures mentioned, the **coleoptile** is unique to monocots. It serves a specific function in protecting the shoot as it emerges, which is not found in dicots (another group of flowering plants).

### Step 4: Conclusion
Based on the analysis, the structure that is unique to the seed of a monocot is the **coleoptile**.

### Final Answer
The structure that is unique to the seed of a monocot is the **coleoptile**.

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