About This Chapter
CSET Science: Evolution - Chapter Summary
In addition to introducing you to theories and explanations for the origin of life on Earth, this chapter delves into natural selection and adaptation and examines various forms of evolutionary change. This collection of video lessons also addresses the following topics:
- Speciation I: Allopatric and Sympatric Speciation
- Speciation II: Prezygotic Barriers
- Speciation III: Postzygotic Barriers
- Cladograms and Phylogenetic Trees: Evolution Classifications
- The History of Life on Earth: Timeline and Characteristics of Major Eras
CSET: Science Evolution Objectives
Before you can begin teaching science in an elementary, middle or secondary school in California, you'll need to pass the CSET: Science exam. The three subtests that make up this exam address general science, as well as your identified area of science expertise. The second of the three subtests requires completion of two short constructed-response questions, along with 58 multiple-choice questions. Fourteen of these questions focus on genetics and evolution.
To refresh your memory - and perhaps even learn some new concepts - watch our video lessons on evolution before taking the CSET: Science Subtest II. After viewing each tutorial, you can test your knowledge through a brief self-assessment quiz. These multiple-choice quizzes were designed with the CSET in mind, so you'll be familiar with the format of the exam come test day.
1. Theories of Evolution: Lamarck vs. Darwin
We'll look at the interplay between population genetics and environment. Are traits individually acquired or do entire populations evolve? The flying hamsters and a few other notable experiments will provide the answers.
2. Natural Selection & Adaptation: Definition, Theory & Examples
How does natural selection help shape the amazing types of animals we witness around us? In this lesson, we'll explore adaptations and what they can tell us about a species' past evolution.
3. Natural Selection: Definition, Types & Examples
We'll take a look at the types of natural selection that can occur. From flying hamsters to moths, you'll start to grasp the different paths organisms can take as they respond to their changing environments over time.
4. 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.
5. 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.
6. 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.
7. Cladograms and Phylogenetic Trees: Evolution Classifications
Family trees help show how people are related to each other. Similarly, scientists use cladograms and phylogenetic trees to study the relationships between organisms.
8. The History of Life on Earth: Timeline and Characteristics of Major Eras
The Earth is over 4.6 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.
9. The Origin of Life on Earth: Theories and Explanations
Ever wonder how living things came from non-living things? We will explore what conditions on early Earth may have created life from non-living items.
10. Evolutionary Change: Definition and Forms
You've probably heard of Charles Darwin and evolution. We know that evolution is change over time, but here we will look at how these changes may have occurred during Earth's history.
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Other chapters within the CSET General Science Subtest II: Practice and Study Guide course
- CSET Science: Ecology
- CSET Science: Genetics and DNA
- CSET Science: Biochemical Compounds
- CSET Science: Molecular Biology and Biochemistry
- CSET Science: Cell Biology
- CSET Science: Human Body Systems
- CSET Science: Plant Biology
- CSET Science: Heat Transfer and Thermodynamics
- CSET Science: Chemistry Overview
- CSET Investigation & Experimentation: Planning a Scientific Investigation
- CSET Science: Math Review