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12 Cards in this Set
- Front
- Back
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Which form of life had early dominance and why? |
marine because low oxygen, PS increased allowing oxidative metabolism, early atmosphere contained ammonia and methane |
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What are the imperfection of fossil records |
biased towards hard shell, incomplete, intermediate |
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What is LUCA |
last universal common ancestor |
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why is LUCA not true |
Because of horizontal gene transfer |
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Define homologies |
looking for similarities between different species as proof of evolution |
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example of homology |
the genetic code because it is degenerate |
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What is sequential substitution |
natural selection |
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What is the Oparin-Haldane theory |
non living synthesis of small organic molecules such as amino acids and nucleotides, joining to form larger molecules, origin of self replication |
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How did Miller and Urey test the Oparin-Haldane theory |
Created conditions suggested in primordial earth although probably not correct now. the electrical charge created wasn't realistic but did create amino acids |
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What is the Iron Sulfur theory |
Life formed on the surface of iron sulphide minears which acted as catalysts. Had early forms of metabolism. |
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What is the iron-suflide world theory |
Hydrothermal vents provide warmth to bacteria and act as interface between cold and warm water. structure of rocks provides organisation like cells |
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How is entropy a criticism |
life goes against entropy, life wants to be ordered and this requires work, gibbs free energy. BUT THERE IS LIFE |
