Who is Mitochondrial Eve?

The first female Homo Sapiens Sapiens to ever successfully reproduce with another male of the same species is widely known as Mitochondrial Eve. The reason that scientists have dubbed her to be the mother of our species is that she contained a traceable lineage of DNA that the cells in her body could not create on their own. A mitochondrion is a eukaryotic cellular organelle that manufactures its own DNA and replicates on its own within the limits of the cell wall. Researchers hypothesize that, at one point in time, this organelle was an entity independent of plant and animal cells. It was probably incorporated into cells through an endosymbiotic relationship that lasted millions of years. Once they became stable in an environment that was self-preserving, they benefited their new hosts by providing them with energy in the form of ATP and NADPH. Since this organelle reproduces on its own, there is no connection between human reproduction and mitochondrial reproduction. Scientists can then reach a deduction that leads us ever closer to the actual mother of humanity. Eve, the familiar term coined in the Old Testament when Adam is told by YHWH to name his counterpart, is added to the term to make it more understandable to many people who have a hard time reasoning that anything beyond the limits of the bible is true or even plausible. It also makes it sound somewhat catchy.
http://www.youtube.com/watch?v=OjdZ5GmU61o 

How did she give rise to different types of people?
Throughout the course of human history, the environment has shaped us to adapt to the many different types of climates that this planet has to offer. For example: Africans have a much higher melanin concentration in their epithelial layers due to their constant exposure to the hot equatorial sun in Africa. Conversely, people who live in Scandinavia have pale skin, light hair colors (mostly blonde, some brown), and are among the tallest people in the world. Greeks have an olive skin complexion that meets between Africans and Scandinavians, coupled with dark curly hair and striking eyes (usually golden brown or green). Asians can have a variety of appearances, but the most common or most widely known is a yellow skinned complexion with narrow eyes, short stature, limber joints, and higher average intelligence. Brazilians have a similar complexion to Greeks, but their body plans tend to resemble a combination of spaniards and native americans.