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Ch 4: TASC Science: Interdependence in Ecosystems

About This Chapter

Refresh your knowledge about the environment, symbiotic relationships, camouflage and populations. Use our video lessons and quizzes to prepare for the TASC Science exam.

TASC Science: Interdependence in Ecosystems - Chapter Summary

These lessons and quizzes can help you review your knowledge of ecology, ecosystems and habitats to prepare for the TASC Science exam. The video lessons and quizzes explore topics that will help you with the following types of questions on the quiz:

  • Understanding levels of ecology
  • Getting the gist of what ecological niches are
  • Exploring interspecific competition and competitive exclusion
  • Describing predator/prey interactions, warning coloration and mimicry
  • Looking at symbiotic relationships
  • Examining populations, including density, life histories and survivorship
  • Understanding carrying capacity, migration and dispersion

Led by our expert instructors, you'll get the information need to ace the TASC Science exam. These videos and quizzes show you about ecosystems and various types of relationships.

Objectives of the TASC Science: Interdependence in Ecosystems Chapter

The TASC Science exam is a high school equivalency exam that assesses your knowledge of a variety of science concepts. The topics in this Interdependence in Ecosystems chapter are listed as high emphasis core ideas among life sciences topics. There will be about 2 to 5 questions on these topics on the test. Life science questions in general make up 36% of the 50 test questions.

Most of the questions on the test are multiple choice, but there is also one constructed-response question; students who take this test on a computer will also have one technology-enhanced question. You can use the quizzes at the end of our lessons to prepare for these of questions, testing your knowledge and practicing your test-taking skills.

7 Lessons in Chapter 4: TASC Science: Interdependence in Ecosystems
Test your knowledge with a 30-question chapter practice test
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.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

4. 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 Relationships: Mutualism, Commensalism & Parasitism

5. 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.

Populations: Density, Survivorship and Life Histories

6. Populations: Density, Survivorship and Life Histories

Have you ever wondered how biologists determine the populations of animals in a particular geographic area? Watch this video lesson to find out, and discover how scientists look at the survivorship and life histories of many different species.

Carrying Capacity, Migration & Dispersion

7. Carrying Capacity, Migration & Dispersion

Have you ever wondered why some types of birds fly south in the winter or why some animals form territories? Watch this video to learn about a species' maximum growth capabilities, the way its members group themselves and why they might migrate to new locations every year.

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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