Median stacked spectra obtained for z ≤ 0.5 (upper plot) and z > 0.5 (lower plot); the spectra have been evaluated in the low-mass bin (log (M/M_⊙) < 10.25, left panels) and in the high-mass bin (log (M/M_⊙) > 10.75, right panels). In violet are shown the morphological ETGs, in light red the red-sequence galaxies, in dark red the red UVJ galaxies, in pink the red SED galaxies, in orange the quiescent galaxies, and in yellow the red and passive ETGs.