Fig. 5. Worms do not specifically avoid the temperature at which they had been starved. When wild-type worms that were grown overnight at 20°C and then starved for 4 h at 20°C are placed near the middle of linear thermal gradients that span 20°C, they exhibit random dispersal. (A) Data from experiments using a gradient spanning 18–22°C over a 9 cm plate. (B) Data from experiments using a gradient spanning 15–25°C over a 9 cm plate. Upper panels show snapshots of instantaneous worm positions. Lower panels show corresponding histograms.