BIO ORIGINS OF LIFE

BIO ORIGINS OF LIFE - BIOORIGINSOFLIFE...

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BIO ORIGINS OF LIFE - TIMELINE OF LIFE ON EARTH o Earth formed 4.6 billion years ago o First prokaryote 3.8 billion o 4 billion first life? o Oxygen in the atmosphere 2.7 billion years ago o Eukaryotes 2.2 billion o 1.4 billion, multicellular organisms o 600 million years, animals appear o Land plants, 500 million years o Humans, 150 000 years ago - Cyanobacteria green, photosynthetic bacteria responsible for the oxygenation of the earth - Stages of prebiotic evolution: o Abiotic synthesis o Heritable information o Formation of cells Geophysical stage what was the composition of the atmosphere? Chemical state how can the building blocks of life be formed Biological stage how do you organize the chemicals into cells? - Early atmosphere Water, Hydrogen, Ammonia, Methane, Hydrogen sulfide. NO OXYGEN LOL - Lots of UV energy hitting the atmosphere - Reducing atmosphere - Miller/Urey experiment making chemicals from inorganic chemicals
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- - DNA base pairs, sugars, lipids, proteins, fucking everything basically was
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BIO ORIGINS OF LIFE - BIOORIGINSOFLIFE...

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