Celegans Young to Old Mothers Embryos (IMAGE) Center for Genomic Regulation Caption Caenorhabditis elegans embryos containing fluorescent yolk from younger (left) to older mothers (right). Credit Marcos Francisco Perez, CRG. Usage Restrictions CC-BY 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.