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22 Cards in this Set
- Front
- Back
Beringia
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Around during the Pleistocene due to glaciation. Land mass connecting Alaska and Siberia (Eastern Europe). It was a corridor for dispersal where animals from Alaska could make it over to Siberia and vice versa.
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Corridor
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filter, allows animals to get from place to another
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Barrier
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blocks animals from getting from once place to another
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Relict
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relict is a population
Relict is talking about the population of species |
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Refuge
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refuge is a place
and the refuge is where the animals are stuck |
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Endemism
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where a species is limited and where it is from
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Allopatric Speciation
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two species living in same area, overtime a mountain range forms, the population splits into two, the mountain in a barrier and the species become to speciate. (mountains, oceans, deserts) changing species Ex. Squirrels in the Grand Canyon, the barrier is the canyon
Spotted cowry: allopatric speciation, barrier is the Isthmus of Panama |
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Hybrid
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overtime, after the barrier is gone, the 2 species once separated that have changed over time and these animals mate and a hybrid is born (liger, tigon)
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Sympatric Speciation
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1 species speciates even though they live together, continuous population, genetic mutation. 2 species diverge due to genetic defect.
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Autopolyploid
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100 tulips in the same flower bed, flowers can self-fertilize, one flower, self-fertilizes itself. Non disjunction event during meiosis
Ex. Tomatoes, fruits |
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Disjunct species
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species in evolutionary stasis
Sweet gum trees in Asia and N. America 2 populations of same species are separated by a large area or distances are known as disjunct species. TRUE |
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Evolutionary Stasis
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small change over a long time
Ex. Oak trees and maple trees: species in evolutionary stasis |
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Cryptic
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species that look identical but are genetically different
Ex. 2 flowers have same morphology but have different genetics, |
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Morphology
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physical characterstics
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Great American Interchange
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The Isthmus of Panama forms North America and South America together
Animals can go freely from North American to South America and vice versa ****More animals from North America go to South America Mammals in North America outcompete mammals in South America More extinction of South American of native mammals than in North America ****Primates got to Africa from South America is island hopping Mammoth Steppe: the Siberian part of Beringia apart from the landmass |
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Mammoth Steppe
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the Siberian part of Beringia apart from the landmass
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Mielke
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in the Pleistocene, Beringia existed. There was a similar land mass between England and Europe
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SLOSS
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single large or several small Who contributed to it?
Jared Diamond, Simberloff |
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Where did Lovejoy do his work?
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amazon
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How are the mountains in Europe?
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east to west
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How are the mountains in North America?
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north to south
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Did dinosaur bones give evidence of glaciation?
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no
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