Question

How does natural selection drive evolution?

Answer 1

Hint: The mechanism by which populations of living organisms adapt and adjust is natural selection. Individuals are inherently variable in a population, meaning that they are all different in certain ways. This distinction means that certain people have attributes that are better suited to the world than others.

Complete answer:
Evolution is a mechanism that over time, results in changes in a population's genetic material. Evolution represents organisms' adaptations to their changing environments which can lead to genes, novel characteristics, and new species being altered. Both changes in genetic variability and changes in allele frequencies over time depend on evolutionary processes.


Natural selection is one factor that drives evolution, which is a process that increases the abundance of beneficial alleles in a population. Organisms that are more likely to survive and replicate are the products of natural selection.

Genetic drift, which explains spontaneous variations in allele frequencies in a population, is another driving force behind evolution. Genetic drift will gradually cause a subpopulation to become genetically different from its original population.Indeed, over a long period of time, genetic drift and the accumulation of other genetic changes will result in speciation, which is the evolution of a new species.

In the preservation of well adapted variants, adaptive evolution may be observed. The East African Cheetah is very well suited to its climate. It is so well suited that there is now only one variation of Cheetah; all other variants have become extinct. Sadly, since there are no other varieties left that could be adapted to a new climate, a change in the environment would possibly cause the extinction of all Cheetahs.

Note: New variants are not produced by natural selection. Natural selection is limited to removing existing variants. Due to this natural selection, adaptive evolution can only be clarified. Natural selection cannot justify descent with alteration or Darwinian evolution. As the engine of Darwinian Evolution, a source of new variations must be invoked.