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solar system and sun begin to form
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Earth begins to form
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Volcanic eruptions cause the formation of the atmosphere
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Archaea are thought to be similar to the types of cellular life that was first on the Earth
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A type of small aerobic prokaryote began to live and reproduce inside a larger, anaerobic prokaryote
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experiments tests Oparin's hypothesis for conditions for formation of organic molecules using an appoattus with gases and electricity (simulated lightening)
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Fossils of stromatolites are known.
-lynbgya cells grow in colonies and form layed structures called stromatolies -
chemical traits of photosynthetic activity
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Earth is formed and resembles the Earth the way it is today
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Oxygen levels reached today's levels
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a type of small aerobic prokaryotes began to live and reproduce inside of larger anaerobic prokaryotes
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protected organisms from harmful UV rays so they could exist on land
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meat experiment
-rotting meat kept away from flies would not produce new flies
-maggots appeared only on meat that had been exposed to flies -
the first microscope was in use
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boiled broth in flasks, sealed one flask, left the other open; sealed flask stayed clear, open flask became cloudy
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Margulis finds that bacteria and organelles are similar
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Cech finds a type of RNA that can act as chemical catalyst (Ribosome)
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researched early cell structures
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used to determine age of fossils by using the half-lives of particular elements
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NH3, H2, H2O, and H/C compounds (CH4) formed simple organic compounds (amino acids). Compounds accumulated in H2O and went through complex chemical reactions (MACROMOLECULES)
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used a variation of Spallanzani's experiment to support that microorganisms are carried in the air and do not arise by spontaneous generation
experiement used a curve-necked flask but after one year, he broke the neck off and the broth became cloudy
