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• Geological change and biological evolution are linked.
• Tectonic plate movement has affected the evolution and distribution of living things.
• Evolution results from selection acting upon genetic variation within a population.
• Traits that are advantageous often persist in a population.
• The process by which advantageous traits are maintained and disadvantageous traits are weeded out of a population is known as natural selection.
• Inherited characteristics affect the likelihood of an organism's survival and reproduction.
• Depending on environmental conditions, inherited characteristics may be advantageous, neutral, or detrimental.
• The amount of genetic variation within a population may affect the likelihood of survival of the population; the less the available diversity, the less likely the population will be able to survive environmental change.
• Evolution acts on what exists.
• Natural selection acts on phenotype as an expression of genotype.
• Populations evolve.
• The proportion of individuals with advantageous characteristics may increase due to their increased likelihood of surviving and reproducing.
• Scientists pose, test, and revise multiple hypotheses to explain what they observe.
• Scientific ideas are developed through reasoning.
• Science does not prove or conclude; science is always a work in progress.
• Science corrects itself.
• Science is a human endeavor.
• Our understanding of life through time is based upon multiple lines of evidence.
• Scientists use the similarity of DNA nucleotide sequences to infer the relatedness of taxa.
• Scientists use experimental evidence to study evolutionary processes.

• Genetic Variation
• Nature of Science
• Natural Selection