Top-down and bottom-up quests: the mystery of life's origin
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The Prebiotic Soupp122-126 Probably all variations of the Miller model using atmosphere are out the window. p126 There may have been oxygen in early atmosphere, which nixes most scenarios. But without oxygen (ozone), radiation would have likely x'd out the prebiotic compounds. The oxygen-ultraviolet paradox. p128 Neither lightning or UV work as energy sources p129 Jeffrey Bada and Antonio Lacazano were colleagues of Miller, and they along with Noam Lahav in his book Biogenesis conclude that the "prebiotic soup" was not there.
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The Replicator-First Scenariop168 Box. Shapiro examines homopolymer problem and comes to the conclusion that it devastates the replicator-first hypothesis.
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Metabolism-First Scenarios
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Challenges to the RNA Worldp161 "I appreciate the origin-of-life community, not only for its remarkable achievements but also for its integrity in widely acknowledging problems with the prebiotic production of nucleases, ribose, and polyphosphates. In fact, in the opening plenary lecture of ISSOL '02, distinguished scholar Leslie Orgel had the courage to say, 'It would be a miracle if a strand of RNA ever appeared on the primitive Earth.' As a preface to this comment, Orgel remarked, 'I hope no creationists are in the audience.'"
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