Test some biology stuff

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Aly 2021-10-12 21:49:32 -07:00
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# Abiogenesis
- Life had to have some way to originate from non-living materials
1. The abiotic (nonliving) synthesis of small organic molecules, such as
amino acids and nitrogenous bases
2. The joining of these small molecules into macromolecules, such as proteins
and nucleic acids
3. The packaging of these molecules into protocells, droplets with membranes
that maintained an internal chemistry different from that of their
surroundings
4. The origin of self-replicating molecules ([[autocatalytic set]]) that
eventually made inheritance possible
- [[RNA World]]: It's proposed that RNA was the first self-replicating molecule
[//begin]: # "Autogenerated link references for markdown compatibility"
[autocatalytic set]: autocatalytic-set "Autocatalytic Set"
[RNA World]: rna-world "RNA World"
[//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
- [[Hadean]]: 4.571 BYA to 4.0 BYA
- Named due to hellish conditions
- [[Archaean]]: 4.0 BYA to 2.5 BYA
- Reasonably condusive to life
- Pretty certain that cellular life originated here
- 3.48 BYA: First cellular life, [[Stromatolites]]
- 3 BYA: Oxygenic photosynthesis defines the end of the Archaean
- [[Proterozoic]]: 2.5 BYA to 541 MYA
- 2.8 BYA to 1.9 BYA: Banded Iron Formations imply periods of high
oxygenation
- CH₄ (Methane) + 2O₂ → CO₂ + 2H₂O: Methane concentration decreased, while
Oxygen and CO₂ increased
- [[Huronian Glaciation]]
- [[Ediacaran]]
- [[Phanerozoic]]: 541 MYA to Present
- Started with a mass-extinction event
- Divided into [[Paleozoic]], [[Mesozoic]], and [[Cenozoic]]
[//begin]: # "Autogenerated link references for markdown compatibility"
[Hadean]: hadean "Hadean"
[Archaean]: archaean "Archaean"
[Stromatolites]: stromatolites "Stromatolites"
[Proterozoic]: proterozoic "Proterozoic"
[Huronian Glaciation]: huronian-glaciation "Huronian Glaciation"
[Ediacaran]: ediacaran "Ediacaran"
[Phanerozoic]: phanerozoic "Phanerozoic"
[Paleozoic]: paleozoic "Paleozoic"
[Mesozoic]: mesozoic "Mesozoic"
[Cenozoic]: cenozoic "Cenozoic"
[//end]: # "Autogenerated link references"

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# Hadean

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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