What are the major components of a cell nucleus?

Explanation

### Step-by-Step Solution:

1. **Identify the Nucleus**: The nucleus is a vital organelle found in eukaryotic cells, often referred to as the control center of the cell because it regulates various cellular activities.

2. **Nuclear Envelope**: The first major component of the nucleus is the nuclear envelope. This is a double membrane structure that surrounds the nucleus, providing a barrier and protecting the contents inside. It has pores that allow the transport of substances in and out of the nucleus.

3. **Nucleoplasm**: The second component is the nucleoplasm, which is the semi-fluid substance found within the nuclear envelope. It serves as a medium that supports the other components of the nucleus.

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