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Ch 13: TASC Science: Natural Selection & Adaptation

About This Chapter

Watch these short, entertaining video lessons to examine natural selection and adaptation processes as you study for your TASC Science test. If you have any questions about the evolutionary and biological concepts presented in the lessons, reach out to our instructors for guidance.

TASC Science: Natural Selection & Adaptation - Chapter Summary

Prepare for the natural selection and adaptation concepts you can expect to find on the TASC Science assessment by watching these short, mobile-accessible video lessons. This chapter investigates the following ideas:

  • Darwin's theory of evolution
  • Natural selection and adaptation processes
  • Classifications of natural selection
  • Effects on phenotype
  • Why there is no effect on genotype
  • Convergent evolution

The lesson quizzes present you with situations to analyze and problems to consider to boost your retention of basic evolutionary ideas. If you feel shaky about any of the concepts, take a look at the video transcripts for a second look. You can also ask our instructors for help.

Objectives of the TASC Science: Natural Selection & Adaptation Chapter

About a third of the TASC Science test is devoted to questions about life sciences. Use these videos on natural selection and adaptation to master some of the evolutionary and biology concepts you're likely to bump into on that portion of the exam. As an additional bonus, the lesson quizzes mimic the TASC format and allow you to introduce yourself to the question styles on the computer-administered test.

You'll be allowed 75-80 minutes to work through the 55 tasks on the assessment. In addition to life sciences, you will also be tested on physical sciences and Earth/space sciences.

5 Lessons in Chapter 13: TASC Science: Natural Selection & Adaptation
Test your knowledge with a 30-question chapter practice test
Theories of Evolution: Lamarck vs. Darwin

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.

Natural Selection & Adaptation: Definition, Theory & Examples

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.

Natural Selection: Definition, Types & Examples

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.

Why Natural Selection Acts on Phenotype, Not Genotype

4. Why Natural Selection Acts on Phenotype, Not Genotype

Evolution works through the mechanism of natural selection. This mechanism influences the genetic make-up of populations, acting on the population's physical traits. In this lesson, we'll explore examples of why this is.

What Is Convergent Evolution?

5. What Is Convergent Evolution?

It can be difficult to tell whether species are related just by looking at them. Organisms look and act the way they do because of ancestry, but similarities also arise because of similar environmental roles, as is the case with convergent evolution.

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.
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