Indian Jumping Ant (Harpegnathos saltator) (image) North Carolina State University Share Print E-Mail Caption The Indian jumping ant (Harpegnathos saltator) is a model organism for epigenetics researchers because it can undergo significant changes in physiology without any related changes to its DNA. Instead, the physiological changes depend on which genes are turned on or off -- which in turn is determined by social and environmental factors. Credit Clint Penick Usage Restrictions Photo credit must be given. 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.