Comparisons of simulation (left) and observations (right) results. In the left panels, we assumed that there are 10 000 galaxies with stellar mass spanning uniformly from 10^9.7 M_⊙ to 10^11.7 M_⊙ in each simulation subsample (ETDs vs. LTDs). Both subsamples have normal distributions of SFR but the mean SFRs between them are different (see upper left corner for details). The upper left panel shows the normalized histograms of sSFR for ETDs (red) and LTDs (blue), fitted by using the normal distribution (dashed line). The corresponding mean sSFR values in the log scale are displayed near the vertical dashed lines. The center left panel presents the sSFR-mass distribution. The lower left panel depicts a histogram of Q_mor, obtained by the random sampling of 500 galaxies in each simulation subsample, with the process repeated 1000 times. The red vertical dashed line represents the threshold of Q_mor = 0.15, and the fraction of Q_mor ≥ 0.15 is shown at the top. The right panels show similar results as the left panels, but for a real sample from this work, including 1296 ETDs and 1296 LTDs.