Fig. 2. Survival of wild type (N2), daf-9 mutants and daf-d; daf-9 double mutants. Each curve depicts one of the two independent trials represented in Table 1. The life spans were determined from the percentage of worms alive on a given day. (A) daf-9 single mutants at three temperatures. (B) daf-d; daf-9 double mutants at 15°C.