About This Chapter
Speciation - Chapter Summary
In this chapter, you'll explore the processes involved in speciation and examine evidence supporting evolution. Specifically, you'll review:
- Allopatric and sympatric speciation
- Prezygotic and postzygotic barriers to speciation
- The use of fossil evidence to support biodiversity, speciation and mass extinction
The instructors have worked hard to develop lessons that are enjoyable, sufficient and effective. Watch engaging video lessons to get a grasp on the material. Use the timeline below each video to navigate your way through the lesson. Take quizzes along the way to apply what you've learned. After completing the lessons, take a cumulative chapter exam to see how well you've retained the information.
1. Speciation: Allopatric and Sympatric Speciation
Discover the definition of a species and learn more about how species split. Find out common terms related to the splitting of species and study what role polyploidy plays in the development of a species.
2. Prezygotic Reproductive Barriers & Speciation: Definition & Examples
We may take for granted why animals choose to mate with other animals of similar appearance, but it's not that simple. There are actually biological barriers to reproduction that can prevent even seemingly closely related species from reproducing. This lesson looks at one such category of hindrances, prezygotic barriers, which make fertilization impossible.
3. Postzygotic Reproductive Barriers: Definition & Examples
Do flying hamsters represent a separate species from your run-of-the-mill hamsters? We'll get to the bottom of this by performing crosses between the two hamster types. You'll explore postzygotic reproductive barriers and their possibly tragic consequences.
4. Fossil Evidence for Biological Diversity, Speciation, & Mass Extinction
One of the best sources of evidence we have for evolution is the fossil record. Fossils provide a wealth of information on how species change over time and for exciting events like mass extinctions and new species formation.
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Other chapters within the STAAR Biology: Test Prep & Practice course
- Introduction to Organic Chemistry
- Intro to Cell Biology
- Prokaryotic & Eukaryotic Cells
- Virus Structure & Life Cycle
- How Enzymes Work
- Requirements of Biological Systems
- Cell Communication
- Basics of Metabolic Biochemistry
- Overview of Cell Division
- Basics of DNA & RNA
- Process of DNA Replication
- The Transcription and Translation Process
- Plant Biology
- Plant Reproduction and Growth
- Physiology I: The Circulatory, Respiratory, Digestive, Excretory, and Musculoskeletal Systems
- The Nervous, Immune, and Endocrine Systems
- Animal Reproduction and Development
- Heredity and Genetics
- Gene Mutations
- DNA and Technology
- The Origin and History of Life On Earth
- The Theory of Evolution
- Natural and Artificial Selection
- Population Evolution
- Organism Classification & Phylogenesis
- Ecological Systems and the Environment
- Ecological Relationships and Species Populations
- Humans and the Environment
- Lab Safety Equipment and Procedures
- Methods of Scientific Research
- Analyzing and Interpreting Scientific Data
- Famous Biologists and Their Impact on Society
- About the STARR Tests
- STAAR Biology Flashcards