11. Goldschmidt thought that small gradual changes could not bridge the hypothetical divide between microevolution and macroevolution. 12. As biologists define " macroevolution ", both microevolution and macroevolution have been observed. 13. Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution.14. The core of the debate for me, therefore, is the extrapolation of microevolution to macroevolution ." 15. This acceptance of " microevolution " only within a " kind " is also typical of old Earth creationism. 16. "' Microevolution "'is the change in allele frequencies that occurs over time within a population. 17. Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution . 18. Typically, observable instances of evolution are examples of microevolution ; for example, bacterial strains that have antibiotic resistance. 19. Macroevolution includes changes occurring on geological time scales, in contrast to microevolution , which occurs on any time scale. 20. These differences in diet and foraging behavior between coastal and inland snake populations suggest that the species has undergone microevolution .
