13 terms

Chapter 15 Darwins theory of evolution(Brittany Schumacher)

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Evolution
change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
theory
a belief that can guide behavior
fossil
the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
artificial selection
selection by humans for breeding of useful traits from the natural variation among different organisms
struggle of existence
competition of species in their living space for space, food and other needs of life
fitness
ability of an organism to survive and reproduce in its environment
adaptation
the process of adapting to something (such as environmental conditions)
survival of the fittest
a natural process resulting in the evolution of organisms best adapted to the environment
natural section
a term that describes the unequal survival and reproduction that results from the presence or absence of particular traits
descent with modification
principle that each living species has descended, with changes, from other species over time
common descent
principle that all living things were derived from common ancestors
homologous structure
structures that have different mature forms in different organisms but develop from the same embryonic tissues
vestigial organ
organ that serves no useful function in an organism