#250 Smarter Organisms

Some of the most basic organisms are smarter than we thought. Rather than moving about randomly, amoebas and plankton employ sophisticated ___ to look for food and might travel in a way that ___ their foraging. Immediately upon an amoeba turning right, it was twice as likely to turn left as right again, and vice versa, they addressed a meeting of the American Physical Society in Denver, Colorado, last week. This suggests that the cells have a rudimentary ___ , being able to remember the last direction they had just turned in.