It is false to say that all single-celled organisms are prokaryotes. This is because some single-celled organisms are eukaryotes. It is however true that all prokaryotes are unicellular organisms. Prokaryotes are organisms that lack a nucleus and other specialized organs. Examples are archaea and bacteria.
Eukaryotes have a distinct nucleus and can either be unicellular or multicellular. Yeast is an example of a eukaryote that is unicellular. Because of the organelles that eukaryotes possess, they are most times larger in size than prokaryotes.
Summarily, it is false to say that all single-celled organisms are prokaryotes.
Learn more about prokaryotes here:
https://brainly.com/question/6748944
