Fossil Record - The record of the all the fossils ever discovered on earth, extinction - Event that occurs when the last individual organism of a species dies, biological evolution - The change over time in populations of related organisms, relative dating - Compares the ages of the sedimentary rock layers - younger near the top and older further down., absolute dating - Uses the decay of radioactive isotopes to determine the actual age of igneous rocks., variation - A slight difference in an inherited trait among individual member of a species., natural selection - The process by which organisms with variations that help them survive in their environment live longer, compete better, and reproduce more than those who do not have the variations., adaptation - An inherited trait that increases an organism’s chances of surviving and reproducing in a particular environment., selective breeding - The selection and breeding of organisms of desired traits, homologous structure - Body parts of organisms that are similar in structure and position but different in function, analogous structure - Body parts that perform a similar function but differ in structure., vestigial structure - Body part that has lost its original function through evolution, embryology - The science of the development of embryos from fertilization to birth,

Evolution Vocab

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