• [Mechanisms of evolution: Grades 13-16] Evolution results from natural selection acting upon genetic variation within a population.
• [Mechanisms of evolution: Grades 13-16] Inherited characteristics affect the likelihood of an organism's survival and reproduction.
• [Mechanisms of evolution: Grades 13-16] The number of offspring that survive to reproduce successfully is limited by environmental factors.
• [Nature of science: Grades 13-16] Scientific knowledge is open to question and revision as we come up with new ideas and discover new evidence.
• [Nature of science: Grades 13-16] A hallmark of science is exposing ideas to testing.
• [Nature of science: Grades 13-16] Scientists test their ideas using multiple lines of evidence.
• [Nature of science: Grades 13-16] Scientists use multiple research methods (experiments, observational research, comparative research, and modeling) to collect data.
• [Nature of science: Grades 13-16] Scientists can test ideas about events and processes long past, very distant, and not directly observable.
• [Nature of science: Grades 13-16] Scientists may explore many different hypotheses to explain their observations.
• [Nature of science: Grades 13-16] Scientific findings and evidence inspire new questions and shape the directions of future scientific research.
• [Nature of science: Grades 13-16] Science is a human endeavor.
• [Studying evolution: Grades 13-16] Our knowledge of the evolution of living things is always being refined as we gather more evidence.

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• Adaptation
• Nature of Science