Environmental Pressure - An environmental condition that forces organisms to adapt in order to survive and reproduce., Adaptation - Any change in features of a species that helps it to survive., Genetic Variation - Differences in genes or traits., Evolution - The change in the characteristics of a species over many generations and relies on the process of natural selection., Natural Selection - The process through which populations of living organisms adapt and change. Explain how species change over time., Favorable Traits - Traits that give an organism some advantage that makes them more likely to survive and reproduce., Generation - A group of offspring that were born at around the same time., Predator - An organism that kills and consumes other organisms for food., Prey - An organism eaten by a predator for food., Scientific Theory - A well tested explanation backed by overwhelming evidence., Evidence - Any observations or experimental results that indicate that a theory is valid., Fossils - The remains of a prehistoric organism preserved in rock.,

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