Friday, October 29, 2010

Favorite Biome

The mountain biome is set in high altitude that is cold in temperature. It can have ice glaciers and usually has little or no vegetation growing in it. It will easily noticed once a person reaches this biome because there will be a timber line that indicates the climate being inadequate for trees. There is a low diversity of plants and animals found in the high mountains. It is a very harsh climate biome but is among the most beautiful scenery in the world.

Monday, October 25, 2010

Favorite Organism

A lot of people believe that great white sharks hang around warm shallow water, but in reality scientist have found that the shark travels around to very different habits. Using trackers, researchers have found that great whites travel to deep waters and very cold waters. Traveling to the deep waters is part of their life cycle somehow but no one knows why.

Friday, October 22, 2010

Mitochondrial Eve

Mitochondrial Eve is thought to be the common ancestor of all humans. It is believed that since the mitochondria DNA is passed from only the mother, then all humans have the same common mitochondrial DNA. So even though over time humans have evolved to look different, there is a part of us that remains the same. Just like with any evolution, we have developed traits and adaptations that become useful for the habitat the population is located. These adaptations can range from height, size, skin color, and other physical forms. This has been caused by humans relocating from the original location of the Mitochondrial Eve in the Great Rift Valley in Africa. As the human race spread across the world, with different habitats, the diversity of the physical appearance has become more dramatic. It is thought though that one day in the future the human race will become one race again with the same physical traits, and once again look like our common ancestor. It is thought that we will all have the same height with tan skin, dark hair, dark eyes. Below, there are pictures of Mitochondrial Eve, examples of the diversity today, and some tribes of that still remain in Africa.

                                                        Mitochondrial Eve