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Ch. 23, 24, 26

TermDefinition
uniformitarianism the processes at work today operate the same as those in the4 past (usually referring to geologic processes)
essentialism
fossil record species look different in some rock layers than other suggesting that they had changed
intraspecific variability you can look at a species at one point in time and see a lot of variation
jean-baptise lamarck person who published the first formalized theory of evolution
lamarckism inheritance of acquired characteristics
adaptation traits/characteristics that increase fitness relative to individuals lacking them
parent-offspring regression plots phenotypic traits of offspring against those of parents
microevolution we can directly observe heritable changes in populations within our lifetime
vestigial structure useless or rudimentary body part that has a function in a closely related or ancestral species (phylogenetic inertia)
law succession extant forms in certain region look most like extinct forms from that same region
ring species connected series of populations where each adjacent neighborhood can interbreed but the ends are too dissimilar to breed
homology similarity between species as a result of common ancestry (despite differences in function)
molecular homology
molecular clock differences in DNA used to estimate time of divergence between groups
convergent evolution similarity among relatively unrelated species due to similar selection pressures, not common ancestry
reversal a reversion from derived trait to the ancestral version
parallel evolution development of similar specializations in closely related species that were absent in the ancestor
Created by: cshockey
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