BIOL240 Lecture Notes - Reducing Atmosphere, Microbiology, Prokaryote
13 Sep 2014
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Document Summary
Earth for much of its history. Microorganisms have been around for at least 3. 8 billion of the 4. 6 billion years since the earth was formed. Multicellular eukaryotic organisms (= metazoans) have evolved comparatively recently, and have been around for less than 1 billion years. The atmosphere of the early earth was quite different than the present atmosphere. It is now thought by many scientists that the first life was rna- based (figure 16. 4). There are many examples of ribosome molecules (ribozymes) that possess catalytic properties. The early life forms could have thus been composed of rna only, and no. There is some discussion in the textbook about the higher fidelity of. Dna replication compared to rna replication, but it is unclear how much of this is a. Fundamentals of microbiology (biology 140) Dr. josh d. neufeld property of the different polymerase enzymes rather than the different types of macromolecules.
