Microbial Markets (IMAGE) Washington University in St. Louis Caption The existence of market behaviors, such as picking the partner offering the best commodity at the lowest price, among microbes suggest that at least some of these behaviors do not require cognition. Credit Tracy Collins/ WUSTL Creative Services 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.