Term
| Oparin-Haldane Hypothesis |
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Definition
| organic molecules can form in a reducing atmosphere in the presence of an energy source |
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Term
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Definition
organic molecules from inorganic precursors
1.set up closed system to simulate early earth conditions with flask of water simulating primeval sea. (reducing atmosphere: H2, methane, ammonia, water vapor)
2. Sparks discharged to mimic lightning (energy source)
3. a condenser cooled atmosphere, raining water and dissolved compounds
4. Result: found amino acids common in proteins of organisms and hydrocarbons
5. Conclusion: Organic molecules can form in strongly reducing atmosphere |
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Term
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Definition
| small organic molecules polymerize when concentrated on hot sand, clay, or rock |
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Term
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Definition
collections of org molecules surrounded by membranes
-May exhibit simple reproduction, metabolism, and maintenance of internal environment different from external environment.
-could have formed spontaneously from abiotically produced organic compounds |
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Term
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Definition
| first genetic material (not DNA-requires complex enzymes) |
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Term
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Definition
| catalyze replication, self-splicing, other reactions |
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Term
| Early protobionts with self-replicating, catalytic RNA |
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Definition
-Could have been more effective at using resources.
–Because of heritable genetic material, these would be capable of mutation, variation, and increase in number through natural selection
-Later, RNA may have served as a template for DNA, a more stable and more reliably copied genetic material |
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Term
| Earliest Fossil Life was how old |
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Definition
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Term
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Definition
| rock like build ups created by microbes |
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