Scientists don't use evolution directly to classify species. The modern taxonomic system predates the theory of evolution by over a century (Linneus, one of the more influential people involved in its widespread acceptance wrote Systema Natureae in 1735 while Darwin didn't come along with The origin of Speciesuntil 1859).
They group species by sets of shared characteristics. However, organisms evolving from shared ancestors also share many of the characteristics from that common ancestor so it ends up correlating with evolutionary paths very closely.
It's probably more accurate to say that evolutionists use taxonomy than the other way around.
Taxonomy
There is strong support for the theory of evolution due to fossils that have been found by archeologists. The fossil records show evidence of evolution over billions of years.
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We often debate the way a baseball should be thrown or that someone wrote in an article that the way to hold a gun when shooting is THIS way not THAT way.The people who oppose the idea of evolution are those who take the Christian bible literally.Creationism is a religious belief. It says that all life began all at once just a few thousand years ago and has not changed.Evolution says no to that view point. The universe is billions of years old and that things changed slowly over time and organisms adapt to survive in those changing environments.These two will never agree and creationism should be seen in a religious light.
A limiting factor is important because without it there would be billions and billions of organisms that would never decrease they would just keep on increasing.
The human foot verses the chimpanzees foot, for instance. Both organisms diverged from common ancestry, but their feet were subject to vastly different environmental pressures and function in very different ways now, though their commonality is rather obvious.
There are billions of organic molecules
long, billions of years
The process of evolution
There is strong support for the theory of evolution due to fossils that have been found by archeologists. The fossil records show evidence of evolution over billions of years.
Tiny microscopic organisms have made this rock over billions and billions of years
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