The nucellus is protected by envelopes and the composite structure is called:-

Options

A. Megaspore
B. Microspore
C. Ovule
D. Cone

Answer

To solve the question, "The nucellus is protected by envelopes and the composite structure is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components**: The question mentions the "nucellus," which is a part of the ovule in seed plants. The nucellus is surrounded by protective layers.

2. **Identify the Structure**: The protective layers around the nucellus are part of the ovule. The ovule itself is a composite structure that includes the nucellus, integuments (the protective envelopes), and sometimes other components.

3. **Review the Options**: The options given are:
- Megaspore
- Microspore
- Ovule
- Cone

4. **Analyze Each Option**:
- **Megaspore**: This is a spore that develops into a female gametophyte but does not refer to the composite structure that includes the nucellus.
- **Microspore**: This refers to the male gamete and is not related to the nucellus or its protective structures.
- **Ovule**: This is the correct term for the composite structure that includes the nucellus and its protective envelopes.
- **Cone**: This is a structure found in gymnosperms that contains the ovules but does not directly refer to the composite structure of the nucellus.

5. **Conclusion**: Based on the analysis, the correct answer is **ovule**, as it is the term that encompasses the nucellus and its protective envelopes.

### Final Answer:
The composite structure that includes the nucellus protected by envelopes is called the **ovule**.

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