The nuclear membrane, also called the nuclear envelope, is a double-layered membrane that surrounds the nucleus of a cell. It serves as a barrier between the nucleus and the cytoplasm, controlling the movement of substances in and out of the nucleus.

Here's why it's important:

* Protection: The nuclear membrane protects the genetic material (DNA) within the nucleus from damage.

* Regulation: It regulates the transport of molecules between the nucleus and the cytoplasm, ensuring that only necessary materials can enter or leave the nucleus.

* Structure: It provides a framework for the nucleus, maintaining its shape and integrity.

So, whether you're looking at a plant cell or an animal cell, you'll find this crucial membrane safeguarding the cell's genetic information.