BIOL 112 Lecture Notes - Lecture 14: Ultraviolet, Acetic Acid, Speciation
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BIOL 112 Full Course Notes
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Evolution occurs by gradual accumulation of small changes. Missing intermediate stages of evolution = no fossils. *fossils only reveals major changes in groups of organisms. Evolutionary history consists of geologically long periods of stasis/stability with little/no evolution. & followed by geologically short periods of rapid evolutions. Universe solar system earth microfossils of prokaryotes photosynthetic bacteria eukaryotes. 1- earth & atmosphere = form through volcanoes. 2- primordial seas formation = as earth cooled gases condense = sea w/ water + minerals. 3- complex molecules were synthesized = formation of organic soup from inorganic/energy from. Uv/lighting/heat/radiation acetic acid & formaldehyde & amino acids. Organic soup theory if o2 present*very reactive =no organic molecules would have formed. *operi(cid:374)"s hypothesis = origin earth environment was reducing/providing chemical. Requirements to produce complex molecules from simple building block. In oxidizing environment = complex molecules broken apart. Tested theory of above & produced organic molecules. * miller & urey used ammonia/methane/water/hydrogen sealed + simulated lightning.
