Lecture 9 - Lecture 9 A Transition from Chemistry to...

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Lecture 9 A. Transition from Chemistry to Biology Life on the Earth originated in a series of steps, each which seems reasonably likely, eventually DNA, fats, carbohydrates and all sorts of other chemicals are recruited into life as we know it o Lead to the first cells and those capable of reproducing themselves B. Cellular Complexity- Carl Woese recognized a unique group of prokaryotes the Achaea, that are genetically and structurally distinct from bacteria Three domain system- based on genetic sequencing and gives another data set in understanding the interrelations among organisms o Naturally delineates organisms based upon their cell type Every living organism belongs either to one of the two branches of prokaryotes of Eukaryote C. Prokaryotes or Eukaryote- Prokaryotes- small cell size, DNA dispersed in nucleoid region and the cell type cannot form complex multicellular organism Eukaryotes- large cell size, has nucleus with DNA, and cells can combine to form
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