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Ch 21: Holt McDougal Modern Biology Chapter 21: Ecosystems

About This Chapter

The Ecosystems chapter of this Holt McDougal Modern Biology textbook companion course helps students learn essential modern biology lessons on ecosystems. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Ecosystems textbook chapter.

How it works:

  • Identify the lessons in the Holt McDougal Modern Biology Ecosystems chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the ecosystems topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Types of biomes
  • Ocean and freshwater ecosystems
  • Plants and animals of the open ocean biome
  • Plants and animals of freshwater biomes

Holt McDougal Modern Biology is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

5 Lessons in Chapter 21: Holt McDougal Modern Biology Chapter 21: Ecosystems
Test your knowledge with a 30-question chapter practice test
Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More

1. Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More

Take a trip around the world and learn all about different biomes. Why can you only find certain plants and animals in specific places? What are the most fertile climates on Earth? Watch on to answer these and other questions.

Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines

2. Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines

Take a trip with us in this lesson, starting in the Pacific Ocean, traveling across California through the Central Valley and up to the peaks of the Sierra Nevada mountains. We'll learn how oceans, elevation, and people can determine which types of biomes are found in different areas and check out the Earth's most massive and oldest organisms.

Ecosystems of Oceans and Freshwater: Biological Diversity and Water

3. Ecosystems of Oceans and Freshwater: Biological Diversity and Water

In this lesson, you'll learn about the biodiversity of ecosystems based on water. You will discover that marine, freshwater and a mixture of salt and freshwater create very different ecosystems, which in turn influence the amount of biodiversity that is found in these habitats.

Open Ocean Biome: Plants, Animals, Climate & Definition

4. Open Ocean Biome: Plants, Animals, Climate & Definition

Seventy-one percent of the surface of our planet is covered by the oceans. It should be no surprise that the open ocean biome is the largest biome on Earth. In this lesson, we will investigate the properties and inhabitants of the open ocean biome.

Freshwater Biomes: Climate, Locations, Plants & Animals

5. Freshwater Biomes: Climate, Locations, Plants & Animals

Freshwater biomes are very important to life on Earth. They are home to many different species and provide a lot of resources. In this lesson, we will go over what a freshwater biome is, where they are located, and the different plants and animals that inhabit them.

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.
Not Taken

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