Name the cells which have well-defined nuclear membrane.

Options

A. Prokaryotic cells
B. Eukaryotic cells
C. Symbiotic cells
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Cell Types**: Begin by recognizing the two main types of cells: prokaryotic and eukaryotic. Prokaryotic cells are simpler and do not have a defined nucleus, while eukaryotic cells are more complex and contain a defined nucleus.

2. **Identifying Prokaryotic Cells**: Prokaryotic cells, such as bacteria, lack a nuclear membrane. Instead, their genetic material is located in a region called the nucleoid, which is not enclosed by a membrane.

3. **Identifying Eukaryotic Cells**: Eukaryotic cells, which include plant cells, animal cells, fungi, and protists, have a well-defined nucleus that is enclosed by a nuclear membrane. This membrane separates the genetic material from the cytoplasm.

4. **Evaluating Other Options**: The question also mentions symbiotic cells. Symbiotic cells refer to cells that exist in close physical interaction with each other, but this term does not specifically indicate the presence of a nuclear membrane.

5. **Conclusion**: Based on the analysis, the only type of cell that has a well-defined nuclear membrane is the eukaryotic cell.

**Final Answer**: Eukaryotic cells have a well-defined nuclear membrane.

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