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Campbell Biology 9th Edition - Chapter 22 Flashcards

Descent with Modification: A Darwinian View of Life

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1200531477evolutiongeneration-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 time0
1200531478fossilspreserved remains of once-living organisms1
1200531479stratalayers of sedimentary rock2
1200531480catastrophisma principle that states that geologic change occurs suddenly3
1200531481uniformitarianismis the idea that the geologic processes that operate today also operated in the past4
1200531482paleontologythe earth science that studies fossil organisms and related remains5
1200531483adaptationinherited characteristic that increases an organism's chance of survival6
1200531484natural selectionprocess by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest7
1200531485artificial selectionselection by humans for breeding of useful traits from the natural variation among different organisms8
1200531486homologysimilarity in characteristics that results from common ancestry9
1200531487homologous structuresstructures that have different mature forms in different organisms but develop from the same embryonic tissues10
1200531488vestigial structuresremnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.11
1200531489evolutionary treeA branching diagram that reflects a hypothesis about evolutionary relationships among groups of organisms.12
1200531490convergent evolutionprocess by which unrelated organisms independently evolve similarities when adapting to similar environments13
1200531491analogousHaving characteristics that are similar because of convergent evolution, not homology.14
1200531492Pangaeathe name of the single landmass that broke apart 200 million years ago and gave rise to today's continents15
1200531493endemicnative or confined to a particular region or people; characteristic of or prevalent in a field16
1200531494biogeographydealing with the geographical distribution of animals and plants17

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