___________ separates nucleus from the cytoplasm.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Cell Structure**: Begin by recognizing that the cell is composed of various components, including the nucleus and cytoplasm. The nucleus is the control center of the cell, regulating all cellular activities.

2. **Identifying the Components**: Within the cell, the nucleus is surrounded by a specific structure that serves to separate it from the cytoplasm.

3. **Recognizing the Separation**: The structure that separates the nucleus from the cytoplasm is crucial for maintaining the distinct environment of the nucleus.

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