Life II

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  • The world was a ball of slowly cooling lava. Young Earth was bombarded with meteors, forming a hostile environment unsuited for life.  Meteors brought water and other compounds to the Earth
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  • As hypothesized by Stanley Miller & Harold Urey, basic compounds could react to produce compounds that can form amino and nucleic acids.  The reaction shown produced HCN, a compound that can help form adenine, a nucleic acid. 
  • The process of monomer bonding forms polymers that can replicate and transmit information. The polymer above is adenine, a nucleic acid. 
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  • The replicating polymers helped form RNA, the earliest from of genetic material found in prokaryotes and bacteria. Endosymboyosis, the process of  cells engulfing other cells, aided in the development of Eukaryota. 
  • Stromatolites are some of the  oldest life things, taking the form bacteria covered rocks (like coral). By 3.9 bya, the world was ready for life, though our earliest fossils are from 3.5 bya. The reactions necessary for life occurred in both water or land. 
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  • The examination of both extinct and living organisms reveal the common ancestry of all living thing, through molecular, morphological and genetic proof. 
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