Species - A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce, Evolution - The process by which modern organisms have descended from ancient organisms, Fossils - The preserved remains or traces of an organism that lived in the past, The preserved remains or traces of an organism that lived in the pastThe preserved remains or traces of an organism that lived in the past - An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environmentAn inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment, Natural Selection - A process by which individuals that are better adapted to their environment are more likely to survive and reproduce, Competition - A struggle among living things to get the necessary amount of food, water, and shelter, Mutation - Any change to the genetic material, Fitness - How well an organism can survive and reproduce in its environment, Fossil Record - All the fossils that have been discovered and what we have learned from them, Embryo - A young organism that develops from a fertilized egg (called a zygote), Homologous Structure - Similar structures that related species have inherited from a common ancestor, Extinct - A species that no longer exists and will never again live on Earth, Geologic Time Scale - The summary of Earth’s history, divided into intervals of time defined by major events or changes on Earth,

Unit 4: Change Over Time

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