Fig. 2.

Performance of Drosophila on diet supplemented with B vitamins. Survival to pupation or adulthood of replicate sets of 25 eggs on diets containing 25 g yeast l⁻¹ and 200 g glucose l⁻¹ with supplements as indicated. (A) Survival of conventional and axenic larvae to pupation on diet with casein protein or B vitamin supplement. (B,C) Survival (four replicates) to pupation of conventional (B) and axenic (C) Drosophila on diets with no B vitamin supplement (none), all seven B vitamins (all), and each vitamin individually omitted.