Results of the evolvability test.

Shown are the percentage of simulations that are successful (≥7 segments and domains evolved), and the percentage of this subset of successful simulations that evolve using the SF or using the SS strategy. Results are shown for the default parameter settings and for the 3 series of simulations in which indirect selection for robustness was imposed by adding noise. For details on how these 3 additional series of simulations were performed see Text S1.