Respuesta :
The answer is microevolution and the reason is mutation.
Evolution means when something evolves or changes and gets adopted because of those changes eliminating the previous population and getting fit in the environment and then leading life and growing and increasing their population. Evolution can be both macros which means evolution which is bigger and got sustained for a longer time and microevolution which means evolved but was not able to be sustained for a longer duration and is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection, gene flow, and genetic drift. This change happens over a relatively short amount of time and in the case of the beetle's population, it is an example of microevolution because mutations are changes in genetic level so beetles were able to survive but not for a longer time and the changes didn't leave it effect for longer periods of time and few pieces of evidence of it are pesticide resistance, herbicide resistance, and antibiotic resistance are all examples of microevolution by natural selection.
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