NATS 1940 Lecture 23: Biodiversity Through Time
23 Jan 2020
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Document Summary
Questions for film, the four billion war. There was a sudden increase in diversity of animal life. Rock like structures formed by mucilage secreting marine bacteria (prokaryotes) Bacteria forms mats that collect sediment over time. Which are laid down in layers, and when those layers fossilize they form stromatolites. Swirling dust cloud which lead to denser regions condensed under gravity forming planets and the sun. But did contain water vapor, ammonia, methane, hydrogen, carbon dioxide, hydrogen cyanide and carbon monoxide. Bombardment by comets (made of ice)and asteroids. Provided earth with water due to the ice from comets. Earth cooled from it"s initial hot environment conditions and liquid water formed. When earth cooled hydrogen escaped and water condensed to form oceans. And life came about very soon after liquid water developed on earth. Showed that with the gasses listed above that were in earth"s early atmosphere with lightning in the atmosphere it could produce amino acid and sugar.
