Single-Celled Freshwater Protist, <i>Stentor roeseli</i>, Exhibiting Avoidance Hierarchy (IMAGE) Cell Press Caption This picture shows a sketch of avoidance hierarchy in S. roeseli based on Jennings' original descriptions Credit Dexter et al. & <i>Current Biology</i> Usage Restrictions Credit Required 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.