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How have living things changed over time?

Learning Targets

Learning Experiences

Learning Targets

Learning Experiences

113 I can compare and contrast natural and artificial selection and predict how artificial selection will impact the traits of an organism. (14) 114 I can analyze and interpret data to evaluate the impact of human intervention in determining the traits of agriculturally important plants and animals. (14)

115 I can develop a logical argument for a proposed mechanism of evolution, including necessary adaptations, mutations, and environmental changes. (15)

Students compare organisms derived from artificial selection with their wild ancestors, who were products of natural selection. Attention should be focused on differences in phenotype between wild and domesticated varieties, the desired traits that underwent artificial selection and the methods used to select those differences. Examples could include: • teosinte and modern strains of corn • wolves and any of the modern breeds of dog • carp and ornamental goldfish • wild rose and ornamental hybrid roses • aurochs and domesticated beef or dairy cattle

Students revisit the explanations of natural selection they created during the introductory simulation. In light of new content learned, students are given the opportunity to modify those statements. Students imagine a specific adaptation (or select from an existing list) and hypothesize the evolutionary mechanism that results in that adaptation. What environmental change would cause the adaptation to be advantageous? What genetic variation needs to be present in the population? Would the adaptation need to occur in a single leap or through a series of smaller modifications?

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Teacher Resources

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Artificial vs. Natural Selection Genetic Science Learning Center Students watch a short tutorial that discusses and differentiates between natural and artificial selection. bit.ly/artificial-vs-natural-selection Biotechnology Discoveries and Applications Guidebook 2013 HudsonAlpha Institute for Biotechnology Brief article describes newly discovered genetic differences between wolves’ and dogs’ ability to digest starches (pgs. 14-15). hudsonalpha.org/the-annual-guidebook

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A Field Guide to the Alabama Standards

The Biology Compendium

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