Figure 1. Hydrogen peroxide resistance declines with age. (A-D) Males and females of the Actin-GS-255B strain crossed to the w strain were aged to 3 days or 60 days and then transferred to vials containing kimwipes soaked in 1.0M to 8.0M H2O2 dissolved in 5% sucrose solution, and flies were scored as dead when completely immobile, as described previously . (A) 3 day old females. (B) 3 day old males. (C) 60 day old females. (D) 60 day old males.