Social Amoeba with Fruiting Bodies (image) Washington University in St. Louis Share Print E-Mail Caption Scientists have discovered that one clone of these amoebae carries two bacteria, one that serves it as food and another as a weapon. It's guns and butter, the scientists say. Credit Joan Strassmann Usage Restrictions please credit 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.