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27 Cards in this Set
- Front
- Back
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Pangaea
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250 mya, end of paleozoic era, land masses came together into a supercontinent
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Laurasia
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the northern of the two land masses that split in the mesozoic era
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Gondwana
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the southern of the two land masses during the mesozoic era
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SanAndreas fault
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line where the Pacific and North American plates grind in Cali
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Ordovician-Silurian
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~ 440 mya
12% of families, ~ 65% species went extinct Large glaciation / sea level fall? |
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Late Devonian
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~ 365 mya
~ 14% of families, ~ 72% species went extinct Impact (Siljan crater)? |
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The worst mass extinction
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Permian-Triassic
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Permian-Triassic
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~ 250 mya
~ 52% families, > 90% species went extinct Impact (Bedout Crater); Flood Basalts (Siberia); one continent; global warming; low oxygen conditions |
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End Triassic
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~ 210 mya
~12% families, ~65% species went extinct Impact (Manicouagan Crater); Flood basalts (Central Atlantic) |
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Cretaceous-Tertiary
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~ 65 mya
~11% families, 62% species went extinct (includes Dinosaurs) Impact (Chixculub Crater); Flood basalts (Deccan, India) |
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In the past 400 years ________ species have become extinct?
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1000
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How much more is the current extinction than the fossil record?
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100-1000 times the normal rate
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what follows each mass extinction
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adaptive radiation-survivors adapt to vacant niches
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half life of carbon-14
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5730
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radioactive dating
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measurment of decay in radioactive isotopes
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Krakatoa
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void of life after the 1883 eruption, and is evidence of the founder effect
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t = [ln(Nf/No) / (-0.693)] x t1/2
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Dating fossils
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Who conducted an experiment to test Oparin-Haldane hypothesis? What lab did he work in?
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Stanley Miller
Lab Harold Urey at U of Chicago |
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Why did Miller have a control group? What is the purpose of a control?
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To prove that the spark is what created the bonds
To have something to compare to |
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What this experiment a break through?
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that the orgin of organic compunds could have formed in the conditions of the early atomosphere
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what are the 4 stages of the theory of how life arose?
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abiotic synthesis of monomers
formation of ploymers packing of polymers into protobionts self replicating RNA |
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ex of abiotic synthesis of monomers
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waves could have splashed organic monomers onto hot lava
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ex of making of protobionts
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lipids added to water
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the universe is est. to be how old?
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10-20 byo
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an example of macroevolution
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evolution of flight in 3 different vertebral lineages
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hybrid zones
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areas where groups of different species meet and produce hybrid offspring
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hybrid reinforcement
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when hybrids a weaker than parent species
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