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22 Cards in this Set
- Front
- Back
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What percentage of animal diversity is composed of Invertebrates? |
97% |
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Through which Millenia did the Hadean eon persist? |
4,000-4,600 MYA |
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Through which Millenia did the Archean eon persist?
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2,500-4,000 MYA |
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Under what conditions did first life originate? |
NO OXYGEN (AA's) , Ammonia,Methane, Carbon Monoxide, Cyanide, Hydrogen Sulphide. |
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How did Earth gain a significant amount of amino acids, sugars, nucleic acid bases? |
Comet impacts i.e. comet dust |
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Earth and Extra-terrestrial amino acids differ in what way? |
They are left and right enantiomers. |
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In the Pre-RNA world, chemical evolution took place due to what processes? |
Clay layers allowed; Concentration Nucleation Compartmentalisation Organisation Catalysation Activation |
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Over which millenia did the Pre-RNA world exist? |
4,000 - 3,800 MYA |
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Over what millenia did the RNA world exist? |
3,800 - 3,600 MYA |
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RNA were the first Information Carriers and Functional enzymes, which molecules now function as such? |
DNA and Protein |
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Why can Prokaryote-preserving, silica-based Chert no longer be formed? |
Many marine organisms use silica to form their skeleton. |
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What can be stated as the first living organism? |
Chemoorganoheterotrophs. |
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How did Chemoorganoheterotrophs gain energy? |
Fermentation sugar > alcohol or acid + H2 + CO2 + E |
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Stromatolites are? |
Underwater, stratified microbial mats |
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What do the three layer divisions of Stromatolites consist of? |
TOP LAYERS (living and sticky) Increasing amounts of sand Photosynthetic cyanobacteria (producing Oxygen) MIDDLE LAYERS Green and Purple bacteria BOTTOM LAYERS Dead bacteria in sand |
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Over which millenia did the Proterozoic eon stretch? |
541- 2,500 MYA |
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When did the first eukaryotes approximately appear according to current fossil records? |
2,100 MYA |
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What most likely combined to form the first Eukaryote? |
Archaea + Eubacteria = mitochondriate eukaryote Lokiarchaea a-Proteobacteria |
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What combined proceeding the first eukaryote to form the first plants? |
mitochondriate eukaryote + Eubacteria = PLANTS Cyanobacteria |
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What was the first multicellular, sexually reproducing eukaryote? |
Red Alga |
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Examples of Chemolithoautotrophs are? |
Archaea and methanogens |
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Which bacteria is a Photolithoautotroph? |
Cyanobacteria |
