Surviving bacteria (IMAGE) University of California - San Diego Caption After competing in flasks, different strains of bacteria are moved to agar plates where researchers can evaluate the "winner" by counting numbers of those that survived. Bacteria are identified with red and white markers. Credit Meyer Lab, UC San Diego Usage Restrictions Must be used in conjunction with PNAS paper on phage training. 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.