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botanica
Microevolution refers to changes that occur within a single species or group or organisms.  Microevolution, as opposed to macroevolution, occurs in a short period of time. In microevolution, the ancestor and the descendant obviously belong to the same type.  For example, certain pests have evolved in such a way that they become immune to pesticides; the same thing has happened to certain weeds and herbicides. Hope this helps.
CharlieStryker

Microevolution is the changes in allele frequencies that occur over time within a population. This change is due to four different processes which are presented below:


The five agents of microevolution are:

Mutations

Gene Flow

Genetic Drift

Sexual Selection

Natural Selection


The correct answer choice is: A) It is a change in allele frequency within a population.


I hope this helps, Regards.