Why do we specify time steps while performing simulations?. For example, in node perturbation analysis, I perturb Gene A (knock-out) and simulate how this perturbation affects expression of other genes. I do this perturbation for time steps ts=0 to ts=150. How is the result at ts=0 different from ts =150? Do we give more time steps to see how the perturbed gene affects the expression of other genes as the time evolves? What time steps mean in this analysis?