Which of the mentioned changes in the gene pool of populations can be considered as evolutionary factors?

Under the influence of evolutionary factors – a mutational process, isolation, natural selection, etc. – an elementary evolutionary phenomenon constantly occurs in a population – a change in the population’s gene pool. Useful mutations are preserved by natural selection, harmful mutations accumulate in the population in a latent form, creating a reserve of variability. After several generations, isolated populations living in different conditions will differ in a number of ways. Isolation is also an elementary evolutionary factor, acting at the microevolutionary level, and leads to speciation. Also, gene drift can result in a new species. As a result of all these factors, a new species may appear or the original species may better adapt to environmental conditions.

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