HISTORY 2720 Lecture Notes - Lecture 10: Cell Nucleus, Chemical Evolution, Homeostasis
26 Mar 2018
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Oceanic vents - best guess for origin of thse conditions b. Early fossils of stromatolites - byo but not earliest. Possible fossil imprints and biomarkers as early as 3. 7-4. 1bya. Genes point to divergence from a last universal common ancestor (luca) Life in extreme conditions: heat, ph, and pressure. Chemical energy, various minerals, and cells forming in vents. What it demonstrated - chemicals thought to be here early on and add heat source, you can. What it demonstrated - chemicals thought to be here early on and add heat source, you can get basic amino acids. And what it didn"t - smome chemical probably were"nt. Simple life becomes more complex through darwinian evolution. Same process of (re)production, variation, and selection working on molecules and chemical systems to lead up to greater complexity. Molecular engines use free energy to create order from chaos. Problem #1: even the simplest organisms we know are very complex.
