The sheath enclosing plumule and radicle respectively in monocot seed are

Options

A. coleoptile and coleorhiza
B. coleorhiza and coleoptile
C. scutellum and epiblast
D. aleurone layer and pericarp

Answer

To answer the question about the sheath enclosing the plumule and radicle in a monocot seed, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Monocot Seeds**: Monocot seeds have two main parts: the plumule and the radicle. The plumule is the embryonic shoot, while the radicle is the embryonic root.

2. **Identify the Sheath for Plumule**: In monocot seeds, the sheath that surrounds the plumule (the part that will develop into the shoot) is called the **coleoptile**. This structure protects the young shoot as it emerges from the soil.

3. **Identify the Sheath for Radicle**: The sheath that encloses the radicle (the part that will develop into the root) is known as the **coleorhiza**. This structure protects the young root as it begins to grow.

4. **Match with the Options Provided**: Now, we can look at the options given in the question:
- Option 1: Coleoptile and Coleorhiza
- Option 2: Coleorhiza and Coleoptile
- Option 3: Scutellum and Epiblast
- Option 4: Alluron layer and Pericarp

The correct pair that matches our findings is **Option 1: Coleoptile and Coleorhiza**.

5. **Conclusion**: Therefore, the sheath enclosing the plumule and radicle in a monocot seed are coleoptile and coleorhiza, respectively.

### Final Answer:
The sheath enclosing the plumule and radicle in monocot seeds are **coleoptile and coleorhiza**.

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