• [History of life: Grades 9-12] Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry. (LS4.A)
• [History of life: Grades 13-16] Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry.
• [Mechanisms of evolution: Grades 9-12] Speciation is the splitting of one ancestral lineage into two or more descendant lineages.
• [Mechanisms of evolution: Grades 9-12] Occupying new environments can provide new selection pressures and new opportunities, leading to speciation. (LS4.C)
• [Mechanisms of evolution: Grades 13-16] Speciation is the splitting of one ancestral lineage into two or more descendant lineages.
• [Mechanisms of evolution: Grades 13-16] Occupying new environments can provide new selection pressures and new opportunities, leading to speciation.
• [Nature of science: Grades 9-12] Scientific knowledge is open to question and revision as we come up with new ideas and discover new evidence. (P4, P6, NOS3)
• [Nature of science: Grades 9-12] Scientists test their ideas using multiple lines of evidence. (P6, NOS2)
• [Nature of science: Grades 9-12] Science is a human endeavor. (NOS7)
• [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] Scientists test their ideas using multiple lines of evidence.
• [Nature of science: Grades 13-16] Science is a human endeavor.
• [Studying evolution: Grades 9-12] Our knowledge of the evolution of living things is always being refined as we gather more evidence.
• [Studying evolution: Grades 9-12] Evolutionary trees (i.e. phylogenies or cladograms) portray hypotheses about evolutionary relationships.
• [Studying evolution: Grades 13-16] Our knowledge of the evolution of living things is always being refined as we gather more evidence.
• [Studying evolution: Grades 13-16] Evolutionary trees (i.e., phylogenies or cladograms) portray hypotheses about evolutionary relationships.

• Disciplinary Core Idea LS4.A: Evidence of Common Ancestry and Diversity
• Disciplinary Core Idea LS4.C: Adaptation
• NOS Matrix understanding category 2. Scientific knowledge is based on empirical evidence.
• NOS Matrix understanding category 3. Scientific knowledge is open to revision in light of new evidence.
• NOS Matrix understanding category 7. Science is a human endeavor.
• Science and Engineering Practice 4. Analyzing and interpreting data
• Science and Engineering Practice 6. Constructing explanations and designing solutions

This article includes a video podcast, a set of discussion and extension questions for use in class, and hints about related lessons that might be used in conjunction with this one. Get more tips for using Evo in the News articles in your classroom.

• Nature of Science
• Speciation