- UC Museum of Paleontology
Time: 30 minutes
Figuring out what species are is not as easy as one might think. Find out how biologists define species and how new species evolve.
This article is located within Evolution 101.
- [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)
- [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] Speciation is often the result of geographic isolation.
- [Mechanisms of evolution: Grades 9-12] Speciation requires reproductive isolation.
- [Mechanisms of evolution: Grades 9-12] Occupying new environments can provide new selection pressures and new opportunities, leading to speciation. (LS4.C)
- [Studying evolution: Grades 9-12] Our understanding of life through time is based upon multiple lines of evidence.
- [Studying evolution: Grades 9-12] Scientists use experimental evidence to study evolutionary processes.
- Disciplinary Core Idea LS4.A: Evidence of Common Ancestry and Diversity
- Disciplinary Core Idea LS4.C: Adaptation
Student learning on this topic may be enhanced by class discussion.