Evolution Of A Common Single Celled Origin - 1278 Words

In the course of AP Biology, there are four â€Å"Big Ideas†. The first one is â€Å"The process of evolution drives the diversity and unity of life†. The second is â€Å"Biological systems utilize free energy and molecular building blocks to grow, to reproduce and to maintain dynamic homeostasis†. The third is described as, â€Å"Living systems store, retrieve, transmit and respond to information essential to life processes.† And finally the four is â€Å"biological systems interact, and these systems and their interaction possess complex properties†. (College Board). Every organisms are descendents of each another, and are connected by the same family history. This causes the principle of Big Idea number one. All millions of diverse life forms have arrived†¦show more content†¦It was judged that the polar bears evolved from the brown bears to become comfortable with the growing artic weather. One of the main causes of evolution within a s pecies is the evolving to survive a new environment. And this is just what the polar bears did. So even though they are now completely different, they are linked together by the same family history (Harmon, Katherine). Another example of evolution would involve natural selection. Natural selection is a chief mechanism hidden (under) evolution, and it acts as a phenotypic honor/difference in populations; it kills off those species unfit to survive and if a gene is viewed as a hider, it is either changed or eventually evolved away. But there are those genes that are indifferent to the organism, it neither helps it nor hurts it. This is just like men s nipples. In a male s body, the nipples are of no importance, unlike in females who need them for sexual reproduction. But women and men are both the same species: humans. But we can see a major (many different kinds of people or things) within them: sexual organs, muscle tones, height, hormones, etc. So through the process of evolution t hat humans came to be, there is a grand of life between males and females. But yet, we are so alike in our brains, body functions, organs, limbs, etc. (Scientific American). All living systems need energy; organisms confine this energy for the in biological