Natural Selection, Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success, Evolution, Changes in inherited traits of populations through successive generations, Adaptation, A change that help an organism survive under any circumstances or environment., Ancestors, An earlier organism or species from which later individuals or species have developed from., Fossil, Preserved remains or traces of something that was once alive., Species, A group of living organisms that share similar characteristics and can naturally reproduce with each other to produce fertile offspring., Transitional Fossils, Remains that show the middle stages between one organism and its relatives., Homologous Structures, The same structures (purpose might be different) found in different species with a common ancestor., Analogous Structures, Characteristics that the same function in two species without having a common ancestor. different structures for same purpose = no common ancestor, Embryos, The initial stage of development for a multicellular organism., Theory, An explanation for why things work or how things happen based on ideas that can be tested.

LS3: Appendix Intro to Evolution

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