A Matter of Concentration (image) University of Freiburg Share Print E-Mail Caption The mouse-ear cress was established as a model plant in genetics in the 1940s. Credit Photo: Thomas Kunz Usage Restrictions the image may only be used with appropriate caption or credit. Share Print E-Mail 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.