BIOL 1002 Chapter : CH 20 Outline
Document Summary
There are several different hypotheses as to how life got to earth: the simplest explanation is the most likely. Experiment of miller and urey: what life was like before life on earth, they mimicked the early earths atmosphere. They did not include oxygen because they thought that it was not present in the atmosphere at the time. They used pure water and boiled it and let the vapor travel through the atmosphere, which created lightening. They let it run for a few days, they failed in their experiment. We see that life arose through a number of spontaneous events: as life arose on the planet, it began to evolve. 4 billion years: all bacteria, archea, eukaryotic started from per-biotic suit. A few centuries ago: people thought that new living things appeared all of the time. Co2, ch4, nh3, h2, n2, hcl, h2s, h2o (similar to jupiter today: 2. Frequent storms w/ lots of lightening: 4.
