Nuclear envelope reappears at

Options

A. Metaphase
B. Anaphase
C. Cytokinesis
D. Telophase

Answer

**Step-by-Step Solution:**

1. **Understanding Cell Division Phases**:
- Cell division occurs in stages, particularly during mitosis, which consists of several phases: prophase, metaphase, anaphase, and telophase.

2. **Identifying the Role of the Nuclear Envelope**:
- The nuclear envelope is a double membrane that surrounds the nucleus in eukaryotic cells. Its behavior changes during the different phases of mitosis.

3. **Analyzing Each Phase**:
- **Prophase**: The nuclear envelope begins to break down, and the nucleolus disappears. Chromosomes become visible as they condense.
- **Metaphase**: Chromosomes align at the metaphase plate, but the nuclear envelope is still not present.
- **Anaphase**: The chromatids separate and move towards opposite poles. The nuclear envelope is still absent.
- **Telophase**: The chromatids reach the poles, and the nuclear envelope starts to reappear around each set of chromosomes. The nucleolus also reappears, and the chromosomes begin to de-condense back into chromatin.

4. **Conclusion**:
- The question asks when the nuclear envelope reappears. Based on the analysis, the correct phase is **telophase**.

5. **Final Answer**:
- The nuclear envelope reappears at **telophase**.

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