This figure shows a representation of the growth of a bacterium in the presence of antibiotic A. The horizontal axis is labelled time and the vertical axis is labelled log (no. of viable cells). The line crosses the vertical axis near the bottom before sloping upwards. The first arrow indicates the timepoint at which antibiotic A was added. After the first arrow the line flattens out and remains constant. The second arrow indicates when antibiotic A was removed. At this point the graph stops.