Here's why:

* Prokaryotes are single-celled organisms (like bacteria and archaea) that lack a nucleus and other membrane-bound organelles.

* Plant cells, on the other hand, are eukaryotic cells that have a nucleus, chloroplasts, and a cell wall.

So, while plant cells have structures like chloroplasts, cell walls, and vacuoles, these are absent in prokaryotic cells.

Let me know if you have any other questions about cell structures!