108269.fig.002a
(a) Bacterial trajectories
108269.fig.002b
(b) According to fitness evolution
Figure 2: Bacteria evolution on . Bacterium 1: start point (−1.5, 1.5), run-length unit parameter , chemotactic steps to precise goal (0.1) are 184; Bacterium 2: start point (1.5, −1.5), run-length unit parameter , cannot reach the precise goal.