Reduction division in angiosperm occurs at the time of ?

Options

A. Asexual reproduction
B. Apomixis reproduction
C. Vegetative reproduction
D. Microspore and megaspore formation

Answer

To answer the question "Reduction division in angiosperm occurs at the time of?", we need to understand the concept of reduction division and its significance in the life cycle of angiosperms.

### Step-by-Step Solution:

1. **Understanding Reduction Division**:
- Reduction division, also known as meiosis, is a type of cell division that reduces the chromosome number by half. This process is crucial for sexual reproduction as it leads to the formation of gametes (sperm and egg cells).

2. **Identifying the Context**:
- In angiosperms (flowering plants), reduction division occurs specifically during the formation of gametes. This is essential for sexual reproduction.

3. **Analyzing the Options**:
- **Option A: Asexual Reproduction**: This type of reproduction does not involve the fusion of gametes and therefore does not involve reduction division.
- **Option B: Apomixis Reproduction**: Apomixis is a form of asexual reproduction that mimics sexual reproduction but does not involve fertilization. Thus, it does not involve reduction division.
- **Option C: Vegetative Reproduction**: Similar to asexual reproduction, vegetative reproduction does not involve gametes or reduction division.
- **Option D: Microspore and Megaspore**: This option refers to the formation of spores, which are produced through meiosis, indicating that reduction division occurs here.

4. **Conclusion**:
- The correct answer is **Option D: Microspore and Megaspore**. Reduction division occurs at the time of microspore and megaspore formation in angiosperms, which is part of the process leading to the formation of male and female gametes.

### Final Answer:
Reduction division in angiosperm occurs at the time of **microspore and megaspore formation**.

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