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

Ecology is the study of organisms and how they interact with the environment they live in. Explore ecology principles and the organismal, population, community, ecosystem, and biosphere levels of ecology.
Ecosystems, Habitats and Ecological Niches

2. Ecosystems, Habitats and Ecological Niches

Habitats are areas of the ecosystem where specific organisms live, while niches are the individual roles that organisms play within the ecosystem. Discover factors that affect an animal's niche and how population density impacts an ecosystem.
Interspecific Competition, Competitive Exclusion & Niche Differentiation

3. Interspecific Competition, Competitive Exclusion & Niche Differentiation

When two species within the same environment require the same resources, it creates interspecific competition. Explore how interspecific competition creates competitive exclusion, local extinction, and niche differentiation.
Symbiotic Relationships: Mutualism, Commensalism & Parasitism

4. Symbiotic Relationships: Mutualism, Commensalism & Parasitism

Understand how different species can exist in symbiotic relationships. Learn about the different types of symbiotic relationships: mutualism, parasitism, commensalism, and amensalism.
Food Chains, Trophic Levels and Energy Flow in an Ecosystem

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

Understand how food chains and their trophic levels create energy flow within a food web. Learn about food chains, the trophic levels of food chains, and the amount of energy that flows through a food web.
Biogeochemical Cycling and the Phosphorus Cycle

6. Biogeochemical Cycling and the Phosphorus Cycle

Like all elements, phosphorus cycles through organisms and their host environments via a process called biogoechemical cycling. Explore biogeochemical cycling and the phosphorus cycle, and also learn about the different types of macrominerals and how they are utilized by different organisms.
The Nitrogen Cycle, Acid Rain and Fossil Fuels

7. The Nitrogen Cycle, Acid Rain and Fossil Fuels

Nitrogen is an essential component of all living things, and this chemical component is a part of a natural cycle called the nitrogen cycle. Learn about the nitrogen cycle, the different forms of nitrogen, the process of nitrogen fixation, and the process of how acid rain is produced.
The Carbon Cycle and Long-Term Carbon Storage

8. The Carbon Cycle and Long-Term Carbon Storage

Carbon is important to all living organisms, and humans, animals, plants, and other living organisms all play a role in the carbon cycle. Learn about important processes in the carbon cycle, including photosynthesis and cellular respiration, and understand long-term carbon storage.
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