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Ch 13: Adaptation in Biological Evolution

About This Chapter

Take a look at this engaging chapter on adaptation in biological evolution if you need some help studying for an important exam. The mobile-friendly video lessons were developed by expert instructors, and they can give you confidence as you work to do your best on test day.

Adaptation in Biological Evolution - Chapter Summary

The lessons in this chapter cover adaptation in biological evolution for your review. Short videos feature subjects such as survival of the fittest and Herbert Spencer, plus examples of natural selection and adaptation. Once you complete this chapter, you should be ready to:

  • Describe the theory associated with natural selection and adaptation
  • Detail genotype-environment interaction and phenotypic plasticity
  • Identify the broad-sense heritability equation
  • Explain environmental changes and adaptation in organisms
  • Differentiate between individual accommodation and gradual adaptation
  • Discuss the different causes of microevolution
  • Outline allopatric and sympatric speciation
  • Explore the causes of species extinction

Review these topics at your leisure on any mobile device or computer 24 hours a day. We've included self-assessment tools that include lesson quizzes and a chapter test, so you'll have an effective way to check your comprehension. Each of our videos is up to ten minutes long and easy to navigate using the video tabs feature if you'd rather not watch the whole thing.

9 Lessons in Chapter 13: Adaptation in Biological Evolution
Test your knowledge with a 30-question chapter practice test
Survival of The Fittest & Herbert Spencer: Definition & Examples

1. Survival of The Fittest & Herbert Spencer: Definition & Examples

What is Social Darwinism? How is it different than evolution? What does Social Darwinism have in common with Darwin's theories of evolution? Where did Survival of the Fittest come from, and what does it mean?

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.

Genotype-Environment Interaction and Phenotypic Plasticity

3. Genotype-Environment Interaction and Phenotypic Plasticity

It's not just what's in your genes. In this lesson, we'll begin to explore how some phenotypes are influenced by the interaction between a genotype and the environment. Further, some organisms rely on phenotypic plasticity to change in response to the environmental changes.

The Broad-Sense Heritability Equation

4. The Broad-Sense Heritability Equation

Heritability describes how a phenotype is affected by genetic variation. Who you are is more than just your DNA - it's somewhat influenced by things, like what you eat and where you live. In this lesson, find out how geneticists account for variations using the broad-sense heritability equation.

Environmental Changes & Adaptation in Organisms

5. Environmental Changes & Adaptation in Organisms

In this lesson, we will discuss what happens when an organism is forced to deal with environmental changes. You will learn what adaptation is and how organisms benefit from it.

Individual Accommodation vs. Gradual Adaptation

6. Individual Accommodation vs. Gradual Adaptation

Sometimes we encounter new environmental conditions that take some getting used to. As individuals, our bodies may quickly and temporarily accommodate for the short-term, but populations may adapt gradually for the long-term.

Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift

7. Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift

Environments are dynamic, which causes populations to be as well. In this lesson, you'll learn about microevolution, as well as the mechanisms behind it that cause changes in allele frequencies within populations.

Speciation: Allopatric and Sympatric Speciation

8. 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.

The Causes of Species Extinction

9. The Causes of Species Extinction

What do dinosaurs, passenger pigeons, and a species of Australian rat all have in common? They have all gone extinct. This lesson will examine the causes of species extinction from mass extinctions in the past to human-caused extinctions today.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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