<i>Stentor roeseli</i> Behavior (IMAGE) Dartmouth College Caption New research may have put to rest a century-old question on the behavior of the single-cell organism S. roeseli, shown here (a) resting, (b) bending, (c) contracting and (d) detaching in response to an irritant. Credit Image credit: Joseph Dexter and Sudhakaran Prabakaran/Current Biology. Usage Restrictions Must credit: Joseph Dexter and Sudhakaran Prabakaran/Current Biology. 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.