A noncellular layer present on the outside of nucellus is

Options

A. Integument
B. Exine
C. Endostomium
D. Cuticle.

Answer

To solve the question "A noncellular layer present on the outside of nucellus is", we will analyze the options provided and determine which one correctly identifies the noncellular layer.

### Step-by-Step Solution:

1. **Understand the Nucellus**:
- The nucellus is a tissue found within the ovule of seed plants, and it plays a crucial role in the development of the female gametophyte.

2. **Evaluate the Options**:
- **Option A: Integument**
- The integument is a protective layer surrounding the ovule, but it is a cellular layer. Therefore, this option is incorrect.

- **Option B: Exine**
- The exine is the outer layer of pollen grains, not related to the nucellus. Thus, this option is also incorrect.

- **Option C: Endostomium**
- The endostomium refers to the space between the inner integument and the nucellus. Since it is not a layer, this option is incorrect as well.

- **Option D: Cuticle**
- The cuticle is a noncellular, waxy protective layer that can be found on the surface of various plant structures, including the outer layer of the nucellus. This option correctly identifies the noncellular layer we are looking for.

3. **Conclusion**:
- Based on the analysis, the correct answer is **D: Cuticle**.

### Final Answer:
The noncellular layer present on the outside of the nucellus is the **Cuticle**.

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