Volvox carteri: parent organism (IMAGE) Bielefeld University Caption The multicellular, spherical green alga Volvox carteri serves the researchers as a model organism. The image shows a parent organism with 16 daughter organisms inside. Credit Photo: Bielefeld University/A. Hallmann Usage Restrictions The image may only be used with appropriate caption and credit. License Original 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.