Before revision: Dynamical chaos - i.e., exponential sensitivity to small perturbations - is thought to play a key functional role in a diverse range of complex biological processes, from underpinning flexible information processing in the brain to boosting cellular survival rates through the promotion of heterogeneous gene expression .
After revision: Dynamical chaos - i.e., exponential sensitivity to small perturbations , appears everywhere in nature. Moreover, chaos is predicted to play diverse functional roles in living systems .