3. Which of the following organelles control what enters and exits the cell?*1 pointA. Cell wallB. Cell membraneC. VacuoleD. Nucleus

Step 1: Analyze the Options

Let's examine each of the given options to determine which organelle is responsible for controlling what enters and exits the cell:

1. Cell Wall (A): This structure provides support and protection to the cell, primarily found in plant cells. It does not selectively control the entry or exit of substances.

2. Cell Membrane (B): The cell membrane is a selectively permeable barrier that controls the movement of substances in and out of the cell. It is crucial for maintaining the internal environment of the cell.

3. Vacuole (C): Vacuoles are storage organelles that can hold various substances, but they do not control what enters or exits the cell.

4. Nucleus (D): The nucleus houses the cell's genetic material and regulates gene expression, but it does not directly control the entry or exit of substances.

Final Answer

The correct answer is B. Cell membrane, as it is the organelle responsible for controlling what enters and exits the cell.