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Ch 36: Praxis General Science: Theory & Key Mechanisms of Evolution

About This Chapter

Review this chapter to refresh your knowledge of the theories and key mechanisms of evolution. Thorough comprehension of this information will benefit you while you study for the Praxis General Science exam.

Praxis General Science: Theory & Key Mechanisms of Evolution - Chapter Summary

These lessons will allow you to review the key concepts of the theory of evolution to help you prepare for the Praxis General Science test. In addition to detailing various pieces of evidence about evolution theory and examples of random mutation, this chapter will address the following:

  • Hardy Weinberg Equilibrium
  • Evolution and adaptation
  • Natural and artificial selection
  • Speciation and genetic variability

This chapter is led by a science expert whose aim is to present the information to you as clearly and comprehensively as possible. At the end of each brief lesson is a short multiple-choice self-assessment which will help you gauge how well you understand the content of the lessons. There is also a more extensive chapter exam that will give you the opportunity to test your knowledge to determine what you need to study more and what you are confident about answering.

7 Lessons in Chapter 36: Praxis General Science: Theory & Key Mechanisms of Evolution
Test your knowledge with a 30-question chapter practice test
Evolution Theory, Evidence & Rates

1. Evolution Theory, Evidence & Rates

This lesson will briefly introduce the theory of evolution, discuss a few pieces of evidence supporting the theory of evolution, and discuss the rates of evolution.

Hardy-Weinberg Equilibrium: Definition, Equation & Evolutionary Agents

2. Hardy-Weinberg Equilibrium: Definition, Equation & Evolutionary Agents

In this lesson we will define Hardy-Weinberg equilibrium and break down the Hardy-Weinberg equation to figure out if a population of hypothetical beetles is evolving.

Natural Selection & Adaptation: Definition, Theory & Examples

3. 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.

Natural Selection: Definition, Types & Examples

4. 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.

Overview of Speciation Types & Barriers

5. Overview of Speciation Types & Barriers

Have you ever wondered how a new species arises? This lesson will examine speciation, or when a new species forms, as well as barriers that prevent separate species from mating.

Genetic Variability and Random Mutation

6. Genetic Variability and Random Mutation

Evolution is driven by variation among populations. The amount of variability determines how well a population can adapt to environmental changes, while random mutations can provide new variations that help a population adapt to unexpected changes.

Artificial Selection in Evolution

7. Artificial Selection in Evolution

Humans have been selectively breeding for desirable traits in plants and animals for a long time. This artificial selection allows for a lot of control in the breeding process but can also lead to unintended mutations within a population of organisms.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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