Ch 19: MTLE Life Science: Organisms & Their Environment

About This Chapter

Use this chapter to prepare for questions on the MTLE Life Science exam regarding the relationships and interactions between organisms and their environment.

MTLE Life Science: Organisms & Their Environment - Chapter Summary

These lessons have been composed to help teacher candidates like yourself improve your understanding of organisms' niches in their environment, different aspects of ecosystems and the different relationships between organism of an ecosystem. Use these lessons to prepare for exam questions on the Minnesota Teacher Licensure Examination (MTLE) Life Science exam about:

  • Different types of natural habitats and habitat destruction
  • How adapting to an environment and competition affects an organism's niche
  • Different aspects of ecosystems and how organisms adapt to them
  • Mutualism, commensalism and parasitism
  • Functions of intraspecific competition
  • Behaviors and roles of predators in ecosystems
  • Processes of ecosystems and ecosystem ecology

These lessons are mobile device compatible so that you can watch them even when you are away from your desk. After watching these lesson videos, try reading the lesson transcripts for an additional review of the material. Use the lesson quizzes to discover topics you don't understand, and then revisit that information with the video tags, which allow you to jump directly to specific parts of the lesson.

7 Lessons in Chapter 19: MTLE Life Science: Organisms & Their Environment
Test your knowledge with a 30-question chapter practice test
What is a Natural Habitat? - Definition & Habitat Destruction

1. What is a Natural Habitat? - Definition & Habitat Destruction

There are many places that animals, plants, and other organisms call home - their natural habitats. In this lesson, you will go over a few natural habitats and discover ways in which some are being destroyed.

Realized Niche: Example & Definition

2. Realized Niche: Example & Definition

Every organism is adapted to environmental conditions in its habitat. However, it sometimes faces competition with other species that limits the conditions under which it can exist. Explore how competition between species can shape an organism's niche.

Ecosystems, Habitats and Ecological Niches

3. 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.

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.

Intraspecific Competition: Example & Definition

5. 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.

Predator in Ecosystems: Definition & Explanation

6. Predator in Ecosystems: Definition & Explanation

This lesson will define what predators are, explain how they behave, and discuss their role in an ecosystem. Examples of predators will also be given.

Ecosystem Ecology: Definition & Explanation

7. Ecosystem Ecology: Definition & Explanation

What powers life? How much energy do animals get from eating plants? What short- and long-term effects will climate change have on our environment? Asking questions such as these help ecologists better understand ecosystems and the processes within 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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.