Plantae organisms are eukaryotic.
Explanation: Eukaryotic organisms have cells that contain a nucleus and other organelles enclosed within membranes. In contrast, prokaryotic cells, like those found in bacteria and archaea, do not have a nucleus or membrane-bound organelles. Plants, which belong to the kingdom Plantae, have complex cell structures that include a nucleus, chloroplasts for photosynthesis, and a rigid cell wall made primarily of cellulose. This distinct cellular organization is a key characteristic that classifies them as eukaryotes.