Researchers Rethink Symbiosis 3 (IMAGE) University of British Columbia Caption This is a single-celled protozoan, Euplotes. Credit Vittorio Boscaro and said Patrick Keeling Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.