BIOL 2010 Chapter Notes - Chapter 22: Lipid Bilayer, Igneous Rock, Chemical Evolution
Document Summary
Four stages leading to life: nucleotides and amino acids were produced prior to the existence of cells. Little amounts of oxygen, so they weren"t oxidized. Prebiotic soup: slow accumulation of molecules in the early oceans over a long period of time. High amount of redox reactions which form complex organic molecules (nucleotides and amino acids) from simple inorganic molecules (h2o, h2, ch4, First people to use experiments to hypothesize origin of life. Showed that this is possible, unable to be conclusive that this is how it happened. Not sure that early environment was reducing, could have been a neutral environment of co and co2. Organic molecules may have been present in the materials from asteroids and comets. Much of this material would have been destroyed however inn the intense heating necessary large objects into the atmosphere and the collision with earth.
