Same as Figure 2 but medians are now computed separately on the quiescent (reds) and star-forming (blues) samples. Solid lines represent fits to n_λ ∝ (1 + z)^β_λ. Fits to the lowest-mass bin for quiescent galaxies are not shown because considered not robust due to the small sample. In the top right corner, we report the number of galaxies in each stellar-mass bin using the same color coding, and we show the median uncertainty on the Sérsic index as a black error bar. For both populations, n_λ mildly evolves with redshift for low-M_⋆ galaxies while it does for the ones at high-M_⋆.