Prokaryotic cells have a well-defined nucleus bound by a nuclear membrane.
True or False.

Answer

To determine whether the statement "Prokaryotic cells have a well-defined nucleus bound by a nuclear membrane" is true or false, we can follow these steps:

### Step 1: Understand the Definition of Prokaryotic Cells
Prokaryotic cells are simple, unicellular organisms that lack a true nucleus and membrane-bound organelles. They are typically smaller than eukaryotic cells.

**Hint:** Remember that prokaryotic cells include organisms like bacteria and archaea.

### Step 2: Identify the Structure of the Nucleus
In biological terms, a nucleus is a membrane-bound organelle that contains the cell's genetic material (DNA). It is surrounded by a nuclear membrane, which is a double membrane structure.

**Hint:** Think about the characteristics that define a nucleus and how it is structured.

### Step 3: Compare Prokaryotic and Eukaryotic Cells
Eukaryotic cells, such as those found in plants and animals, have a well-defined nucleus that is enclosed by a nuclear membrane. In contrast, prokaryotic cells do not have a true nucleus; instead, their genetic material is located in a region called the nucleoid, which is not membrane-bound.

**Hint:** Recall the key differences between prokaryotic and eukaryotic cells regarding their cellular structures.

### Step 4: Evaluate the Statement
The statement claims that prokaryotic cells have a well-defined nucleus bound by a nuclear membrane. Since we established that prokaryotic cells lack a true nucleus and do not have a nuclear membrane, the statement is incorrect.

**Hint:** Focus on the definitions and characteristics of prokaryotic cells to assess the validity of the statement.

### Conclusion
Based on the information gathered, the statement "Prokaryotic cells have a well-defined nucleus bound by a nuclear membrane" is **False**.

**Final Answer:** False