Relation between the fraction of AGN (red solid line, square symbols) or AGN plus TOs (green dashed line, round symbols) with the optical luminosity a), NIR luminosity b), and morphology c) for the SDSS complete sample. In the morphology panel we also show the fraction (black dotted line, diamond symbols) of AGN plus TOs plus unclassified galaxies (galaxies without detected emission lines that are often referred to in the literature as passive galaxies).