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Campbell Biology 9th Edition - Chapter 22 Flashcards

Descent with Modification: A Darwinian View of Life

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587582732evolutiongeneration-to-generation change in the proportion of different inherited genes in a population that account for all of the changes that have transformed life over an immense time
587582733fossilspreserved remains of once-living organisms
587582735stratalayers of sedimentary rock
587582737catastrophisma principle that states that geologic change occurs suddenly
587582739uniformitarianismis the idea that the geologic processes that operate today also operated in the past
587582740paleontologythe earth science that studies fossil organisms and related remains
587582742adaptationinherited characteristic that increases an organism's chance of survival
587582743natural selectionprocess by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
587582744artificial selectionselection by humans for breeding of useful traits from the natural variation among different organisms
587582745homologysimilarity in characteristics that results from common ancestry
587582746homologous structuresstructures that have different mature forms in different organisms but develop from the same embryonic tissues
587582747vestigial structuresremnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
587582748evolutionary treeA branching diagram that reflects a hypothesis about evolutionary relationships among groups of organisms.
587582749convergent evolutionprocess by which unrelated organisms independently evolve similarities when adapting to similar environments
587582750analogousHaving characteristics that are similar because of convergent evolution, not homology.
587582751Pangaeathe name of the single landmass that broke apart 200 million years ago and gave rise to today's continents
587582752endemicnative or confined to a particular region or people; characteristic of or prevalent in a field
587582753biogeographydealing with the geographical distribution of animals and plants

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