What are plant cells, prokaryotes or eukaryotes?

Plants are eukaryotic cells.

Eukaryote organisms are made up of cells that contain a nucleus and organelles which are surrounded by a plasma membrane and contain many different structures and organelles with a variety of functions. 

The major groups of microorganisms (fungi, protozoa, and algae), and all plants and animals including humans, all belong to this group.

 

On the other hand, a prokaryote is a unicellular organism (single-celled). Prokaryotic cell lacks a true nucleus, mitochondria, and any other membrane-bound organelle. 

Example- Bacteria and Archaea.