Before revision:  Mechanical RGMs will be introduced, and their relationship to conceptual biological RGMs explained . Exemplars of these biological RGMs and their evolution (e.g. introduction of mutations and recombination-like inversions) will be demonstrated using block diagrams  .
After revision:  Mechanical RGMs will be introduced, and their relationship to conceptual biological RGMs . Exemplars of these biological RGMs and their evolution (e.g. introduction of mutations and recombination-like inversions) will be demonstrated using block diagrams .