The eukaryotic cells are essentially two envelope system because they contain

Options

A. cell wall and plasmamembrane
B. plasmamembrance and nuclear membrane
C. plasmamembran and thylakoid
D. double membrance bound cell organelles

Answer

### Step-by-Step Solution:

1. **Understanding Eukaryotic Cells**: Eukaryotic cells are more complex than prokaryotic cells. They contain membrane-bound organelles, including a nucleus.

2. **Presence of Membranes**: Eukaryotic cells have two main types of membranes:
- **Plasma Membrane**: This is the outer membrane that surrounds the entire cell, controlling the movement of substances in and out of the cell.
- **Nuclear Membrane**: This is a double membrane that surrounds the nucleus, which contains the cell's genetic material (DNA).

3. **Formation of Two Envelope System**: The presence of both the plasma membrane and the nuclear membrane creates a "two envelope system".
- The plasma membrane encloses the entire cell.
- The nuclear membrane encloses the nucleus, creating a distinct compartment within the cell.

4. **Function of the Two Envelopes**: This dual membrane system allows for compartmentalization within the cell, which is essential for various cellular processes. It helps in separating the genetic material from the cytoplasm and allows for more complex regulation of cellular activities.

5. **Conclusion**: Therefore, eukaryotic cells are considered to have a two envelope system because they contain both a plasma membrane and a nuclear membrane.

### Final Answer:
Eukaryotic cells are essentially a two envelope system because they contain both a plasma membrane and a nuclear membrane.

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