Here's why:

* Eukaryotic Cells: Plants are eukaryotic organisms, meaning their cells have a true nucleus enclosed within a membrane. This distinguishes them from prokaryotic organisms like bacteria, which lack a nucleus.

* Nucleus Function: The nucleus is the control center of the cell, containing the cell's genetic material (DNA) in the form of chromosomes. It also regulates gene expression and protein synthesis.

* Plant Cell Structure: Plant cells have a distinct nucleus, along with other organelles like chloroplasts, vacuoles, and a cell wall.

So, plants definitely have a membrane-bound nucleus, a defining characteristic of eukaryotic cells.