BIOL-1506EL Study Guide - Final Guide: Glycerol, Homo Sapiens, Cecum
28 Jan 2021
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4000 million years: origin of life > prokaryotes (early cells) 2000 million years: origin of eukaryotic cells (eu = typical) 1000 million years: origin of multicellular organisms. 500 million years: plants colonizing land + animals in sea. 63 million years: extinction of dinosaurs (meteorite) 1 million years: rst hominoids [homo habilis, homo erectus, homo neanderthals blue green algae (cyanobacteria) - o2 photosynthesis (west europe), homo sapiens, homo donovans, homo orensis] 40 000 years: modern humans reach europe. Living things have the ability to replicate themselves or close copies thereof. In the prebiotic earth: various molecules (h2, co2, n2) no o2. Earth was bombarded with energy > chemical reactions. Uv light, lightning, volcanic activity, meteorite impacts, deep sea vents. Random chemical reactions > organic chemicals (a lot of them) Carbon based (one or more, not co2) Carbon based - amino acids, nucleic acids. Think = 1st replicator molecule to develop. Only 80% accurate when replicating, 20% mutation.
