1 The Problem.- 2 The Evolutionary Significance of Genetic Diversity; Ecological, Demographic and Life History Correlates.- The Problem.- Materials and Methods.- The Evidence.- Theoretical Consideration.- The Matching of Evidence and Theoretical Models.- Conclusions and Prospects.- Summary.- Acknowledgements.- References of the Data.- References of the Theoretical Discussion.- Appendix I. The Data Set.- Appendix II. The Biotic Questionnaire.- Appendix III. Transformations of Heterozygosity and Polymorphism Estimates.- 3 Genetic Polymorphism and Neomutationism.- Protein Polymorphism.- Dna Polymorphism.- Implications for Evolutionary Theory.- Acknowledgements.- References.- 4 A Darwinian Theory of Enzyme Polymorphism.- The Model.- The Accuracy of the Numerical Calculations.- Why Is Chaotic Motion Rare in Natural Populations?.- Survival Probability for Populations.- Predictions of the Model at the Genetic Level.- Conclusions.- References.- 5 The Possibility of Stress-Triggered Evolution.
