BIOL 2120 Lecture 3: The Evolution of Cells
18 Jan 2019
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Document Summary
Water allowed macromolecules to be synthesized 3. 8 billion years ago. Oxygen builds up in the atmosphere 2 billion years ago, which allows prokaryotic organisms to carry out photosynthesis. Multicellular life joins the party a little later than 1 billion years ago. Based on the basic chemicals that volcanoes erupted, these combined to form less-complex molecules. Everything was abiotic (non-living, occurring spontaneously) -- synthesis of compounds, polymerization, etc. Stanley miller experiment, make sure you read through this . Heated water on the bottom (to mimic magma) connected to gases on the top including co2, nh3, h2o (key: absence of. O2) he also made lightning apparently which connected and was fed back into the water. Whatever formed in the gas chamber would fall back to the water and accumulate. After analyzation, he found that amino acids did form under these conditions. Deep-sea hydrothermal vents also provided a catalytic environment for coming dissolved gases into organic molecules.
