How can you prove that variation lead to evolution?

1 Answer
May 12, 2018

You can show that variation causes "micro" or adaptive evolution within a species

Explanation:

Variations are causes by differences in the alleles or genes of an organisms. These variations cause differences within the species that can be observed. Examples would be light colored skin and dark colored skin in people and moths.

Evolution means change. This change can be a change within a species. sometimes called adaptive evolution or "micro" evolution.
variation can be used to prove adaptive evolution.

Evolution is used to name descent with modification the concept that all life came from a common ancestor or first primitive cell. sometimes called " Darwinian evolution ( Neo Darwinian evolution) or "Macro" evolution. Variations can not be used to prove Descent with modification.

Species can be observed to change over time. Some variations are better adapted to some environments than other variations. The better adapted variations will thrive and reproduce at a faster rate than the more poorly adapted variations causing a change in the species.

Examples light skinned people can absorb more sunlight to make vital vitamins like vitamin D in the environment of the northern hemispheres . This gives the lighter skinned people a reproductive advantage in the northern hemisphere. While Dark skinned people have more resistance to harmful solar radiation in the tropic.

Peppered moths experiments in England and other observations prove that variations can cause adaptive evolution in species.

Variations can not be used to prove Darwinian or macro evolution. The idea of Darwinian evolution is a theoretical extrapolation from the observations of changes within a species to changes from one species to another species.