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18 Cards in this Set

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Process of Evolution: Gradualism
Morphological Change and speciation are slow, gradual proceses
---GRADUAL
Model of evolution - Punctuated equilibrium
model of evolution, stating that morphological change and speciation are rapid,
PUNCTUATED-shorter
Comparing anatomy to show evolution evidence

Homologous structure
Perform diff tasks but have similar anatomy
Comparative anatomy to show evidence of evolution: analogous structures
Diff anatomies but perform similar tasks
Comparative anatomy to show evidence for evolution: vestigial structures
No known function, anatomcally similar to functional strutcures in related organisms
Comparative embryology to show evidence for evolution
Similar form and sequence of development stages---think EMBRYO, DEVELOPMENT
definition of species
a group of interbreeding organisms
population
members of a species occupying a specific region
gene pool
all the alleles of all the genes of all the individuals in a population
allele frequency
relative occurrence of an allele in the gene pool
MECHANISM OF EVOLUTION - genetic drift
random changes in allele frequency that occur solely by chance
bottleneck (genetic drift)
situations drasticallyu reducing population sizes, leopards and elephant seals. wipes out huge #s of alleles and lots of DNA due to environment---genetic drift!!!
genetic drift: founder effect
islands and blue people of KY, no destruction: example of genetic drift
Mechanism of evolution: gene flow
addition/removal of alleles when individuals exit or enter a population. ethnic cleansing, slavery, hawaii: by destroying persons
Mechanism of evolution: mutation
any change in the sequence of DNA. important to evolution only if they onccur in the germ line, DDT/AIDS
mechanism of evolution : natural selection
increased reproduction of individuals with phenotypes that make them more likely to survive in a particular envirionment (survival of the fittest)
interspecific competition
between individuals of diff species, us an mosquitos
intraspecific evolution
b/w individuals within the same species, males in same species