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Solar system began to form
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The Earth began its formation. It grew by colliding space debris.
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Volcanoes attmitted gas which formed to create the atmosphere
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Methanosarcin barkeri
Produces methane during metabolism, Archaea are thought to be similar to the types of cellullar life that first populated life. -
Lynga Cells
Fossils of stromatolites are are found as old as 3.5 BYA, the lyngya cells grew in layers called stromatolites. Lyngya cells are prokaryotic cells, theat a photosynthetic, and unicellular -
Some forms of life had become photostnthetic.
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Earth appeared much as it does today
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O2 levels reached today's levels
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Aerobic Prokaryote
Type of aerobic prokaryote was engolfed by and began to live and reproduce inside of a larger, anaerobic prokaryote. Theory is called Endosymbiosis. -
Ozone (O3) formed – protected organisms from harmful UV rays so they could exist on land
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Spallazani's Experiment
Spallazani realized that when you seal the glass container of broth it remains clean, but when you leave it open bacteria appears. -
Lynn Margullis proposed that early prokaryotic cells may have developed a mutually benificial relationship.
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Found type of RNA the is found in some unicellular eurokatyotes to act as a chemical catalyst
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Set up experiments to test oparin's hypothesis
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Did extensive research on physical structures that may have given rise to the first cells
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Techniques that can determine a range of plausibe dates for how old objects are. This is how they found out how old the earth is
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Proposed that earlier prokaryotic cells may have developed a mutually beneficial relationship
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Light Microscope that used optical lenses to magnify objects by bending light rays
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Stated how and where elements were assemble into organic compounds. Died before he ever got to test it
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Redi's Experiment
Large amounts of the worlds carbon 14 decayed, Redi realized that when he allowed flies in his meat maggots appeared, and when he didn’t no maggots appeared -
Pasteur's Experiment
Pausture used curve necked beekers to show that gravity causes microorganisms to fall in, they do not just appear.
