1.a. It makes sense that early ancestors continued to spend time in trees after they began walking on two legs. At this time much of their food source still came from fruit, nuts, etc from the trees. To me, it seems like evolutionary pitfall that we came down out of the trees altogether. It seems like it would be in our best interest to be able to still climb in the trees for food. Unfortunately, being a mostly sitting culture, people are loosing their agility which is making us a more and more feeble species.
1.b. It's strange to me that bacteria have a somewhat difficult time reproducing, but still seem to be taking over. I am curious how this happens if bacteria are traveling at 30mph and once they have sex females turn into males. Also, if their genes are so different than any other life form, wouldn't the body instantly recognize them as foreign and therefore attack them?
2. I find the fact that most of our present day mtDNA came from a woman 200,000 years ago interesting. It amost goes along with the creationist belief of Adam and Eve. I also find it interesting to look at the genetic origins of cultures. It seems we have traveled far before the creation of planes and automobiles.
it's possible that the bacteria takes over despite it reproduction difficulties because it's genetic makeup up is of a stronger strand and devours all in it's path unless confronted by a stronger deterrent. Or, it's the manifestation that the true order of the world is matriarchal in nature.
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