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Ch 2: Living Things in Ecosystems

About This Chapter

Feel confident in your ability to excel on a test that assesses your understanding of living things in ecosystems with help from this engaging chapter. Fun lessons, mini quizzes and other study resources are available to strengthen and gauge your knowledge of this subject.

Living Things in Ecosystems - Chapter Summary

Use this chapter to ensure you fully grasp the basics of living things in ecosystems. Lessons provide in-depth analyses of synergism, coevolution, symbiotic relationships, population growth and much more. Completing them at your own pace will enable you to do the following:

  • Define an ecosystem, biotic factor and abiotic factor of an ecosystem
  • Differentiate between an environment and ecosystem
  • Understand ecosystems, habitats and ecological niches
  • Discuss intraspecific and interspecific competition, competitive exclusion and niche differentiation
  • Exhibit an understanding of predator/prey interactions, camouflage and mimicry
  • Describe natural selection and the adaptation process
  • List two types of extinction and discuss ways humans contribute to extinction events

This chapter is completely flexible, enabling you to access all study resources anytime and from any location with an Internet connection. Choose the lessons you want to review based on your desire to refresh or broaden your understanding of living things in ecosystems. At any time, assess your comprehension of the lessons you study by taking their accompanying quizzes. If you develop questions while reviewing this chapter, feel free to send them to our experts.

14 Lessons in Chapter 2: Living Things in Ecosystems
Test your knowledge with a 30-question chapter practice test
What Is an Ecosystem? - Definition & Explanation

1. What Is an Ecosystem? - Definition & Explanation

Similar to a car engine that is made up of multiple parts working together, an ecosystem has interacting parts that support a whole. But how do we define an ecosystem and what are the components they consist of?

Biotic Factor: Definition & Examples

2. Biotic Factor: Definition & Examples

This lesson focuses on the meaning of the term 'biotic factor.' It also introduces other terminology such as the words 'abiotic' and 'ecosystem'. There are real-world examples embedded in the lesson, and a brief quiz follows.

Abiotic Factors of an Ecosystem: Definition & Examples

3. Abiotic Factors of an Ecosystem: Definition & Examples

When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.

The Environment, Levels of Ecology and Ecosystems

4. The Environment, Levels of Ecology and Ecosystems

Do you know the difference between an environment and an ecosystem? In this lesson, you'll find out what makes an environment, and what makes an ecosystem. You'll also learn what ecology is and some of the ways that scientists study ecology using organisms, populations, communities, ecosystems and even the entire biosphere.

Ecosystems, Habitats and Ecological Niches

5. Ecosystems, Habitats and Ecological Niches

Check out this video lesson to understand the many complex aspects of an ecosystem. See how animals live in habitats and survive amongst their surroundings.

Intraspecific Competition: Example & Definition

6. Intraspecific Competition: Example & Definition

How do members of the same species share resources? There's an ongoing struggle among individuals of the same species called intraspecific competition, and this competition is one way that nature controls how large a population gets.

Interspecific Competition, Competitive Exclusion & Niche Differentiation

7. Interspecific Competition, Competitive Exclusion & Niche Differentiation

What happens when two similar species that consume the same resources occupy the same space? Interspecific competition, that's what! Watch our video lesson to learn about the outcomes of this ecological battle.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

8. Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

You probably know that skunks can be quite stinky, bees sting and monarch butterflies are pretty, but do you know why? This lesson will introduce you to the reasons why some animals look or act the way they do and how these things relate to the predator/prey relationship.

Symbiotic Relationship: Definition & Examples

9. Symbiotic Relationship: Definition & Examples

Symbiotic relationships are a special type of interaction between species. Sometimes beneficial, sometimes harmful, these relationships are essential to many organisms and ecosystems, and they provide a balance that can only be achieved by working together.

The Limiting Factors of Population Growth

10. The Limiting Factors of Population Growth

Is it possible for any one population to grow so large it takes over the planet? In this lesson you will learn the answer to that question. You will learn about the limiting factors of population growth and how it controls population numbers.

What is Synergism? - Definition & Environmental Science Applications

11. What is Synergism? - Definition & Environmental Science Applications

After reading this lesson, you'll learn about the two different ways in which synergism can work in the natural world. You'll see how it can be both beneficial and harmful depending on the situation.

Natural Selection & Adaptation Processes

12. Natural Selection & Adaptation Processes

Through the process of adaptation, natural selection shapes the variety of life that exists around us. This lesson will explore some of the ways this process can take place.

Coevolution: Examples & Definition

13. Coevolution: Examples & Definition

Can you imagine having a tongue three times the length of your body? There actually exists a moth with such a tongue, and it evolved due to the features of a flower that it feeds on. Learn about this and other examples of organisms that have evolved together.

What Is Extinction? - Defining Background and Mass Extinction

14. What Is Extinction? - Defining Background and Mass Extinction

In this lesson you'll discover what the term 'extinction' means as well as learn the two different types of extinction: mass extinction and background extinction. You will also discover how humans contribute to extinction events.

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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