Charles Darwin is now considered one of the first founders of the theory of evolution. It started as Darwin took a sailing trip and ended up making a lot of his discoveries the Galapagos Islands. He studied the different traits of the organisms depending on which island they lived on. He had noticed that the organisms which lived longest had characteristics that adapted to the environment they lived in. With years of more observation, he then published his novel Origin Species in 1859. Darwin had the idea that species change over time because of natural selection and all life is related. This was an amazing discovery and is used today to help us understand the theory of evolution.
DNA is very important, because of mutations and the way it can change sequences in DNA itself and if it will either help, by changing or adapting the species or not benefiting, by becoming extinct. DNA contains switches, which can turn “on” and “off” different sequences. This controls the genes and can be the factor for different traits to work, and lead into evolution. We then learn how most organisms have evolved from years ago and were capable to find common ancestors.
Sources
https://www.livescience.com/474-controversy-evolution-works.html
https://www.darwins-theory-of-evolution.com/
https://www.smithsonianmag.com/science-nature/what-darwin-didnt-know-45637001/
http://www.sciencemeetsreligion.org/evolution/dna.php
(Powerpoint Notes from OneNote)