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Scientific theory
Best explanation available for a phenomenon that has been tested substantially
Descent with modification
differences accumulate from generation to genertation
Natural selection
some organisms are more likely to survive and reproduce than others
Theory of evolution
Living species are descendants of ancestral species that were different
Strata
Rock layers
Transitional fossils
A way of viewing fossils over a period of time - shows gradual changes.
Homology
Similarity resulting from a descent from a common ancestor
Vestigial structures
Useless features that once had a purpose
Evolutionary trees
Tack homologous features and chart development over time
Darwin’s finches
Birds have different beak shapes for the kinds of food they eat
Artificial selection
Traits/characteristics that humans favor. (plants have been bred into modern day fruits/vegetables)
Genetic linkage
Genes located closer together are more likely to be inherited together
