DNA and Evolution

Life on Earth is pretty amazing. Absolutely all forms of life, even viruses, have DNA, which enables them to live and pass on their traits. DNA is the code that makes an organism what it is; specifically, it sets the rules for what proteins are made and where they go. All life shares the characteristic of having DNA, from humans to trees.

DNA also seems to prove the common origin of all life. Listen to some of these DNA similarities, retrieved from here. A mouse has 92% matching genes, a fly has 44%, certain single celled organisms has 26%, and even a weed is 17%. All life is extremely similar.

Also, could this mean that life cannot exist without DNA? Does this mean that all life throughout the Universe is similar as well, and aliens really wouldn’t look much different from us? It’s possible.

Observations, Philosophies | Light | May 8, 2009 6:29 pm