SFE histories for different bins of galaxies. In each panel the X-axis is the look-back time in log and the Y-axis the SFR divided by the total amount of gas present at each time as predicted by the model. In the top left panel, we show the galaxies divided into stellar mass bins, in the top right panel we show one mass bin (10^{10.5 − 11} M_⊙) divided into current SFS bins, in the bottom left panel we show the same mass bin divided into four morphology bins (E–Sb) and in the bottom right panel we show a different mass bin (10^{10.5 − 11} M_⊙) divided into the Sb, Sc and Sd morphology bins.