Seema Singh and Bioengineered Tobacco (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories bioengineer Seema Singh examines a tobacco plant that has been genetically engineered for the easy extraction of important chemicals. Credit Photo by Dino Vournas Usage Restrictions None 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.