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15 Cards in this Set
- Front
- Back
Why did Darwin delay the publication of The Origin of Species?
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Because of "special creation" was still very popular
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What is Uniformitarianism and how does it relate to the process of Natural Selection?
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(Geological Process) Uniform & have operated as such from the orgin of the Earth until present
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What is a geometric progression? How does it relate to NS?
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population growth
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What is arithmetic progression? How does it relate to NS?
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food supply
supply gradually increases with large population jumps |
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Finch study -> What type of selection? What influenced beak size ? How did this relate to rainfall?
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~big seed, small seed, everything dying off
~1200 individuals in a pop. that lived up to 16 y/o ~population variation-> variation is genetically heritable ~drough killed lots and they came back adn have beak change ~Natural selection influenced beak size ~Related to rainfall ~Survival & reproduction are non-random |
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What are the conditions necessary for Natural Selection?
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1>Pop. vary in traits
2>traits are genetically heritable 3>More offspring are produced than can survive 4>Survival & reproduction are non-random |
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What are the agents of evolutionary change-review notes of mutation, geneflow, nonrandom mating, genetic drift
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Mutation->errors made by DNA polymerase (protein causing genes=changes in amimo acids)
Geneflow->movement of alleles from one population to anothe Nonrandom mating->indivduals with whom you are likely to share alleles. Assortive-mating with similar genotypes. Disassortive-mating with dissimilar genotypes. Genetic drift->random with respect to fitness (most pronounced in small pops, can lead to random loss & fixation of alleles. |
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What is fitness?
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ability of an individual to produce offspring
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What is artifical selection?
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In the theory of evolution, artificial selection is the process of intentional or unintentional modification of a species through human actions which encourage the breeding of certain traits over others
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How does natural selection produce major change?
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Provides species with traits that will allow them to adapt and survive to the everchanging enviroment
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What is homology?
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Study of likeness or similarity
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What is a vestigial structure?
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Reduced or incompletely developed structure that has little or No function but clearly similar to functioning structures in other species
ex. Tailbone |
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How do imperfect structures relate to the theory of evolution by Natural Selection? What is convergent evolution?
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Imperfect structures of a species relate to the theory of evolutionary change because traits in a population change as the environment correlates so some species structures completely evolved or are a vestigial trait
Convergent evolution-> due to natural selection favoring similar solutions to problems possesed by the environment |
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Be able to recognize disruptive, directional, stabilizing selection.
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Disruptive-> increase of variation-NO MEAN CHANGE
Stabilizing-> NO MEAN CHANGE/loss of variation Directional->MEAN CHANGE/no change in variation |
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What is the difference between macroevolution and microevolution?
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Micro->evolution in population; changes in allele frequencies
Macro-> origin of NEW taxonomic groups (species) |