Theory - a well supported testable explanation of a natural phenomenon, Fossil - remains of ancient organisms, Evolution - process of change over time, Occurs to populations NOT INDIVIDUALS, Charles Darwin - one of the first scientists to publish his ideas about evolution in a book, “The Origin of Species: By Means of Natural Selection”., Natural Selection - An organism's traits/ adaptations making it better suited to survive, reproduce, and pass on those traits., Survival of the fittest - A quick and easy way of explaining natural selection, Homologous Structure - Same structure different function, Analogous Structure - Different structure, same function. EX: Bird wing and butterfly wing, Vestigial Structure - Structures that no longer serve a purpose EX: Whale hips, Common ancestry - the idea that all organisms now alive on Earth and all present day fossils trace back to one or a few “original species.”, Adaptations - inherited characteristic which increases chances of survival, Lamarck - Scientist whose hypothesis was rejected; he believed characteristics acquired by a living organism would be passed on to their offspring, Variation - Difference between traits in individuals of the same species, Transitional Fossil - Fossilized remnants of an organism that came in between a known version of a species and the current species, Industrial Revolution - A transitional period where creating goods by hand changed to using machines., Camouflage  - A defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings, H.M.S Beagle - Ship that Charles Darwin sailed to the Galapagos islands on, Scientific Fact - An indisputable observation of a natural phenomenon,

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