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 Glencoe Biology: Online Textbook Help
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Ch 2: Glencoe Biology Chapter 2: Principles of Ecology

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About This Chapter

The Principles of Ecology chapter of this Glencoe Biology companion course helps students learn the essential biology lessons of an ecosystem's organisms and energy flow. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Principles of Ecology textbook chapter.

How it works:

  • Identify the lessons in Glencoe Biology's Principles of Ecology chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the ecology topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, re-watch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Levels of ecology
  • Ecosystems
  • Habitats and ecological niches
  • Interspecific competition
  • Competitive exclusion
  • Nice differentiation
  • Symbiotic relationships
  • Food chains and trophic levels
  • The phosphorus cycle
  • The nitrogen cycle
  • The carbon cycle

Glencoe Biology is a registered trademark of McGraw-Hill, which is not affiliated with Study.com.

8 Lessons in Chapter 2: Glencoe Biology Chapter 2: Principles of Ecology
Chapter Practice Test
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The Environment, Levels of Ecology and Ecosystems

1. 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

2. 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.
Interspecific Competition, Competitive Exclusion & Niche Differentiation

3. 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.
Symbiotic Relationships: Mutualism, Commensalism & Parasitism

4. Symbiotic Relationships: Mutualism, Commensalism & Parasitism

If your cat or dog has ever had fleas, you've witnessed symbiosis in action. In this lesson, learn the many types of symbiosis in biology, and how these relationships can have a positive, negative, or neutral effect on the individual species.
Food Chains, Trophic Levels and Energy Flow in an Ecosystem

5. Food Chains, Trophic Levels and Energy Flow in an Ecosystem

In this lesson, you'll learn about food chains, food webs, and the different roles that organisms play in an ecosystem. You'll also learn about how energy flows through an ecosystem.
Biogeochemical Cycling and the Phosphorus Cycle

6. Biogeochemical Cycling and the Phosphorus Cycle

In this video lesson, we'll take a look at how elements large and small use other elements to grow. This is achieved through cycles. We'll look at macronutrients, trace elements and the biogeochemical and phosphorous cycles.
The Nitrogen Cycle, Acid Rain and Fossil Fuels

7. The Nitrogen Cycle, Acid Rain and Fossil Fuels

Do you know the difference between nitrite and nitrate? Do you have any clue how all the nitrogen in the atmosphere becomes usable? If you can't answer these questions, then you need to watch this lesson on the nitrogen cycle.
The Carbon Cycle and Long-Term Carbon Storage

8. The Carbon Cycle and Long-Term Carbon Storage

All living organisms have a role in the carbon cycle. Do you know you understand how humans, animals and plants use carbon? This lesson will introduce you to the carbon cycle and explain how it functions on a global scale.
Chapter Practice Exam
Chapter Practice Exam
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Practice Final Exam
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