Trait, A characteristic of an organism; can be inherited (genetic) or acquired in a different way, Natural Selection, The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species, Extinction, When a species no longer exists - can be due to a variety of factors, Common Ancestry, When organisms are descended from a single ancestor, Homologous Structure, Similar anatomies (structures) because they were inherited from a common ancestor, Analogous Structure, Similar traits because of similar environments and NOT because of a common ancestor, Vestigial Structure, Traits that are inherited from common ancestors but because of environmental changes they are not needed anymore, Species, A group of similar organisms that is able to successfully reproduce, Adaptation, 1 : the act or process of changing to better suit a situation. 2 : a body part or feature or a behavior that helps a living thing survive and function better in its environment., Variation, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences or by the effect of environmental factors, Evolution, species change over time in order to survive where they live, Mutation, a change in a living thing's DNA, Convergent Evolution, when two species from unrelated lines develop the same traits or features, Fossil Record, collection of fossils in the Earth's crust and their placement in chronological order, Law of Superposition, each layer of rock is older than the layer above it and younger than the rock layer below it, Principle of Crosscutting, if a fault or other body of rock cuts through another body of rock then it must be younger in age than the rock through which it cuts and displaces., Relative Age, the age of an object or event by comparing it to another object or event, Absolute Age, the exact age of an object or event.

Evolution

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