Free nuclear division in an angiosperm takes place during

Options

A. Pollen formation
B. Endosperm formation
C. Embryo formation
D. Flower formation

Answer

### Step-by-Step Solution:

1. **Understanding Free Nuclear Division**:
- Free nuclear division refers to the process where the nucleus of a cell divides without the division of the cytoplasm (cytokinesis). This means that multiple nuclei can form within a single cell wall.

2. **Identifying the Context**:
- The question asks when free nuclear division occurs in angiosperms. We need to consider the various processes involved in angiosperm reproduction.

3. **Evaluating the Options**:
- **Option A: Pollen Formation**:
- In pollen formation, microspore mother cells undergo meiosis to form tetrads of microspores, which then develop into pollen grains. This process involves cytokinesis, so free nuclear division does not occur here.
- **Option B: Endosperm Formation**:
- During endosperm formation, a single fertilized egg cell divides to form multiple nuclei without cytokinesis initially, leading to a multinucleate condition. This is a classic example of free nuclear division.
- **Option C: Flower Formation**:
- Flower formation involves mitotic divisions, which include cytokinesis. Therefore, this option does not involve free nuclear division.
- **Option D: Embryo Formation**:
- Similar to flower formation, embryo formation involves both nuclear division and cytokinesis, thus not qualifying as free nuclear division.

4. **Conclusion**:
- After evaluating all options, the correct answer is **Option B: Endosperm Formation**, as it is during this process that free nuclear division occurs.

### Final Answer:
Free nuclear division in an angiosperm takes place during **Endosperm Formation** (Option B).

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