Figure 2.

(A) Scheme of microecology consisting of a 2D array of metapopulation. Stable antibiotic gradient is created by flowing nutrient + ciprofloxacin containing streams in one side, while nutrient only stream in the other side. (B) Scheme by Wright5 of the general idea of dividing the space in metapopulation to accelerate evolution (C) ×190 SEM image of hexagonal microhabitat of dimension 200 μm wide (D) ×2500 SEM image of the side of the channel showing 100 nm deep nanoslits (E) ×6000 SEM image of 10 μm deep channel.