Test some biology stuff
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# Abiogenesis
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- Life had to have some way to originate from non-living materials
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1. The abiotic (nonliving) synthesis of small organic molecules, such as
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amino acids and nitrogenous bases
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2. The joining of these small molecules into macromolecules, such as proteins
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and nucleic acids
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3. The packaging of these molecules into protocells, droplets with membranes
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that maintained an internal chemistry different from that of their
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surroundings
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4. The origin of self-replicating molecules ([[autocatalytic set]]) that
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eventually made inheritance possible
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- [[RNA World]]: It's proposed that RNA was the first self-replicating molecule
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[//begin]: # "Autogenerated link references for markdown compatibility"
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[autocatalytic set]: autocatalytic-set "Autocatalytic Set"
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[RNA World]: rna-world "RNA World"
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[//end]: # "Autogenerated link references"
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# Archaean
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# Autocatalytic Set
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# Cenozoic
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# Ediacaran
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# Geologic Timeline
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- [[Hadean]]: 4.571 BYA to 4.0 BYA
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- Named due to hellish conditions
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- [[Archaean]]: 4.0 BYA to 2.5 BYA
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- Reasonably condusive to life
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- Pretty certain that cellular life originated here
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- 3.48 BYA: First cellular life, [[Stromatolites]]
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- 3 BYA: Oxygenic photosynthesis defines the end of the Archaean
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- [[Proterozoic]]: 2.5 BYA to 541 MYA
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- 2.8 BYA to 1.9 BYA: Banded Iron Formations imply periods of high
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oxygenation
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- CH₄ (Methane) + 2O₂ → CO₂ + 2H₂O: Methane concentration decreased, while
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Oxygen and CO₂ increased
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- [[Huronian Glaciation]]
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- [[Ediacaran]]
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- [[Phanerozoic]]: 541 MYA to Present
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- Started with a mass-extinction event
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- Divided into [[Paleozoic]], [[Mesozoic]], and [[Cenozoic]]
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[//begin]: # "Autogenerated link references for markdown compatibility"
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[Hadean]: hadean "Hadean"
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[Archaean]: archaean "Archaean"
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[Stromatolites]: stromatolites "Stromatolites"
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[Proterozoic]: proterozoic "Proterozoic"
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[Huronian Glaciation]: huronian-glaciation "Huronian Glaciation"
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[Ediacaran]: ediacaran "Ediacaran"
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[Phanerozoic]: phanerozoic "Phanerozoic"
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[Paleozoic]: paleozoic "Paleozoic"
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[Mesozoic]: mesozoic "Mesozoic"
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[Cenozoic]: cenozoic "Cenozoic"
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[//end]: # "Autogenerated link references"
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# Huronian Glaciation
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# Mesozoic
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# Paleozoic
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# Phanerozoic
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# Proterozoic
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# RNA World
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# Stromatolites
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