Ch 5: Microorganisms and the Environment: Help and Review

About This Chapter

The Microorganisms and the Environment chapter of this Microbiology Help and Review course is the simplest way to master microorganisms and the environment. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of microorganisms and the environment.

Who's it for?

Anyone who needs help learning or mastering microbiology material will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

  • Have fallen behind in understanding bacteria, microbial contamination, the nitrogen cycle and thermophiles.
  • Need an efficient way to learn about microorganisms and the environment.
  • Learn best with engaging auditory and visual tools.
  • Struggle with learning disabilities or learning differences, including autism and ADHD.
  • Experience difficulty understanding your teachers.
  • Missed class time and need to catch up.
  • Can't access extra science learning resources at school.

How it works:

  • Start at the beginning, or identify the topics that you need help with.
  • Watch and learn from fun videos, reviewing as needed.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Submit questions to one of our instructors for personalized support if you need extra help.
  • Verify you're ready by completing the Microorganisms and the Environment chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Microorganisms and the Environment chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll learn the answers to questions including:

  • Why is nitrogen fixation so important to human and plant life?
  • What happens during the nitrogen cycle?
  • What kinds of bacteria live in anaerobic or deepwater environments?
  • What are thermophiles?
  • How do microbials contaminate our drinking water?

21 Lessons in Chapter 5: Microorganisms and the Environment: Help and Review
Test your knowledge with a 30-question chapter practice test
The Nitrogen Cycle, Acid Rain and Fossil Fuels

1. 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.

Nitrogen Fixation: Significance to Plants and Humans

2. Nitrogen Fixation: Significance to Plants and Humans

Almost 80% of our atmosphere is nitrogen, but we can't use it. We will look at how this unusable nitrogen is converted into a form we can use and why nitrogen is important to plants and humans.

Types of Bacteria Found in Anaerobic Environments

3. Types of Bacteria Found in Anaerobic Environments

This lesson will focus in on the world of anaerobes. We'll discuss the different types of anaerobes that abound on this planet, including obligate, facultative and aerotolerant anaerobes.

Bacteria that Live in Deepwater Vent Ecosystems

4. Bacteria that Live in Deepwater Vent Ecosystems

In this lesson, we will talk about hydrothermal vents, what they are, and what they release. We'll also look into why the substances they release are important for bacteria and higher life forms such as crabs and tubeworms.

Thermus Aquaticus and Other Thermophiles: Definition & Examples

5. Thermus Aquaticus and Other Thermophiles: Definition & Examples

This lesson will go into some very interesting creatures known as thermophiles. We will discuss exotic sounding names such as Strain 121 and Thermus aquaticus and how they revolutionized our thought process and technology.

Microbial Contamination in Drinking Water: Sources & Control

6. Microbial Contamination in Drinking Water: Sources & Control

This lesson will discuss what microbes may contaminate drinking water, what problems they may cause you, how we can test for them, and how we can control them. Find out as we look into coliform bacteria, giardia, and noroviruses.

Chemosynthesis: Definition & Equation

7. Chemosynthesis: Definition & Equation

This lesson introduces the concept of chemosynthesis. It explains that energy is necessary for all life and provides a description of the chemosynthetic process. The lesson also includes examples of where chemosynthesis occurs in nature along with a brief quiz.

Obligate Aerobes: Definition & Examples

8. Obligate Aerobes: Definition & Examples

Obligate aerobes are organisms that need oxygen to survive and multiply. There are some interesting examples of obligate aerobes in the microbial world. Some are useful, some are dangerous, and others are part of our healthy body.

Facultative Aerobes: Definition & Examples

9. Facultative Aerobes: Definition & Examples

Facultative anaerobic bacteria stand out from other bacteria because they can live with or without oxygen. Some of these anaerobes can also cause disease in humans.

Amoeba Protist: Type & Description

10. Amoeba Protist: Type & Description

In this lesson we will explore what makes a protist a protist and an amoeba an amoeba. We will also look at some unique characteristics of these organisms, such as their movement and their method of food consumption.

Examples of Diatom Protists

11. Examples of Diatom Protists

Diatoms are unicellular algae and are some of the most common types of plant material found in water. Read this lesson to learn more about these diverse algae and check out a number of examples--they're beautiful under the microscope!

Examples of Multicellular Protists

12. Examples of Multicellular Protists

Protists are a group of organisms that share characteristics with plants, animals, and fungi, yet they are different enough to earn the status as a separate type of organism. Read this lesson to learn about the rare group of multicellular protists.

Examples of Pathogenic Protists

13. Examples of Pathogenic Protists

In this lesson, you'll explore a type of protist, known as a pathogenic protist, that can live inside another organism and cause it harm. You'll also examine specific types of pathogenic protists, how they enter humans, and the damage they can cause.

Examples of Protists with Flagella

14. Examples of Protists with Flagella

In this lesson we explore what a protist is as well as what it means to be a flagellated protist. Learn some of the many ways this particular group of protists vary, including in environment, relationships, and feeding strategies.

Freshwater Protists Osmotic Problems

15. Freshwater Protists Osmotic Problems

The protists are a very early form of life on our planet. Keep reading to learn more about an important adaption that freshwater protist contain that keeps them alive in water.

Harmful Protists: Definition, Effects & Examples

16. Harmful Protists: Definition, Effects & Examples

Protists are tiny organisms that are found all around us, even if we aren't aware they are there. Complete this lesson to learn about some of the harmful protists that exist and the effects they can have on humans.

Helpful Protists: Types & Activities

17. Helpful Protists: Types & Activities

A few disease-causing protists have given the majority of protists a bad reputation. There are many ways protists are beneficial to people, animals and the environment. Here, you will learn what protists are and how they can be beneficial.

Photosynthetic Protists: Definition & Examples

18. Photosynthetic Protists: Definition & Examples

This lesson defines protist and photosynthetic protists and gives examples of some relevant species. We'll also discuss mixotrophs and explains how they obtain nutrients in both plant-like and animal-like ways.

Plant-Like Protists: Characteristics & Reproduction

19. Plant-Like Protists: Characteristics & Reproduction

Protists are a group of organisms placed in a single kingdom because they do not quite fit into any of the other eukaryotic kingdoms. Plant-like protists resemble plants but have unique characteristics and reproductive options.

Animal-Like Protists: Definition, Characteristics & Examples

20. Animal-Like Protists: Definition, Characteristics & Examples

In this lesson, we'll explore the world of animal-like protists. We'll first discuss what it means to be a protist, then review characteristics that define a protist, and finally, look at a few examples of these widely-ranging organisms.

Extremophiles: Definition & Examples

21. Extremophiles: Definition & Examples

Extremophiles live in conditions outside the moderate environments that most life requires. From high-temperature, deep sea vents to freezing, polar oceans, we'll explore life in some of the most extreme environments on Earth.

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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