**Figure 2.** **AHR-1 displays evolutionarily conserved functions and affects aging in a diet-dependent manner.** (**A**, **B**) *ahr-1* is more sensitive to xenobiotic stress. Pooled lifespan/healthspan curves of 120 worms/condition in 2 independent replicates treated with either DMSO or 5 μM BaP from adulthood are shown. (**C**, **D**) *ahr-1* is more sensitive to UVB stress. Pooled lifespan/healthspan curves of 300 (wt control, *ahr-1* control), 180 (wt UVB) and 178 (*ahr-1* UVB) worms/condition in 3 independent replicates either left untreated or treated with 1200 J/m² UVB from adulthood are shown. (**E**, **F**) AHR-1 affects aging in a diet-dependent manner. Pooled lifespan/healthspan curves of 170 (wt OP50) and 180 (all other conditions) worms/condition in 3 independent replicates grown either on HT115 or OP50 are shown. (**A**–**F**) Statistical test: Log-Rank test, # significance *vs.* control/HT115, * significance *vs.* wt, p-value < 0.05.