Answer :
Microevolution, or a change in allele frequencies over time, can be brought on by natural selection, with fitness-increasing alleles becoming more prevalent in the population over the course of generations.
Microevolution may result from natural selection. The phenotype, or visible characteristics, of an organism is affected by natural selection. Often, genotype largely determines phenotype (the alleles, or gene versions, the organism carries). Natural selection can raise the frequency of the beneficial alleles from one generation to the next, or it can generate microevolution, where a phenotype produced by certain allele.
Example: rabbit's fur color
A population evolves via natural selection:
In comparison to their counterparts, organisms with heritable genetic traits that aid in their ability to survive and reproduce in a certain environment tend to create more offspring. The population will eventually acquire more heritable features that aid in reproduction and survival if this continues over numerous generations. The population generation will change in terms of its genetic make-up and inherited qualities, but it will also change in a way that makes it more suited to its environment.
Learn more about natural selection
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