Word of the Day: Prokaryote May 3, 2017 by A microscopic single-celled organism that has neither a distinct nucleus with a membrane nor any other specialized organelles. Prokaryotes include bacteria and cyanobacteria. Previous articleIs Organic Farming Really Better? It Depends.Next article Word of the Day: Ribosome Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website