CHOOSY EATERS. “Audrey Dussutour of the University of Paul Sabatier in France placed slime molds in the center of a clock face of 11 different pieces of food, each with a unique ratio of proteins and carbohydrates. When presented with this circular menu, slime molds consistently glommed onto the piece of food with optimal balance of nutrients.”
http://www.scientificamerican.com/article/brainless-slime-molds/