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Ch 23: Holt McDougal Modern Biology Chapter 23: Bacteria

About This Chapter

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

How it works:

  • Identify the lessons in the Holt McDougal Modern Biology Bacteria chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the bacteria 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:

  • Characteristics of Archaea
  • Definition and characteristics of bacteria
  • Bacterial cell morphology
  • Gram stains
  • Structure and components of bacterial cytoplasm and the cell membrane
  • Structure and function of bacterial cell walls
  • Other bacterial structures and their functions
  • Bacterial endospores
  • Bacterial plasmids
  • Bacterial conjugation
  • Bacterial transformation
  • Bacterial transduction
  • Symptoms and treatment of diphtheria
  • Antibiotic resistance
  • Types of foodborne illnesses
  • Bioremediation

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

16 Lessons in Chapter 23: Holt McDougal Modern Biology Chapter 23: Bacteria
Test your knowledge with a 30-question chapter practice test
Archaea: Definition, Characteristics & Examples

1. Archaea: Definition, Characteristics & Examples

There is an entire domain of life that is made up of single-celled organisms without nuclei. We're not referring to the Bacteria domain, however. In this lesson, we will examine the main characteristics of the least commonly known domain, the Archaea.

What is Bacteria? - Definition, Characteristics & Examples

2. What is Bacteria? - Definition, Characteristics & Examples

This lesson will introduce the Bacteria, a large and diverse group of microorganisms. We will examine several key characteristics, as well as a few commonly known examples of bacterial species.

Bacterial Cell Morphology and Classification: Definition, Shapes & Arrangements

3. Bacterial Cell Morphology and Classification: Definition, Shapes & Arrangements

Do all bacteria look the same? Definitely not! These tiny, singled-celled organisms come in a variety of morphologies, from cocci to spirals to tetrads. Many bacterial names even have clues to their morphology!

The Gram Stain: Background and Example Organisms

4. The Gram Stain: Background and Example Organisms

Every microbiology student should be familiar with the Gram stain. In this first of two lessons on this technique, we will look at some of the background information before describing and viewing some relevant example organisms.

Bacterial Cytoplasm & Cell Membrane: Structure & Components

5. Bacterial Cytoplasm & Cell Membrane: Structure & Components

Some people say a bacterial cell is just a simple bag of enzymes. This couldn't be further from the truth! Learn about the structure and function of the bacterial cell membrane, what's in the cytoplasm, and how membrane surface area impacts bacterial size.

Bacterial Cell Walls: Structure, Function & Types

6. Bacterial Cell Walls: Structure, Function & Types

The bacterial cell wall has to be strong to prevent cell lysis but also porous to allow transport across the cell membrane. In this lesson, we will examine the structure of the bacterial cell wall and how it accomplishes both of these crucial tasks.

Bacterial Structures and Their Functions

7. Bacterial Structures and Their Functions

A bacterial cell is not smooth like a balloon. Bacteria can be covered with a wide range of structures like pili and capsules that give each species of bacteria different abilities. In this lesson, you will learn about several of these key external structures of bacteria.

Bacterial Endospores: Definition & Formation

8. Bacterial Endospores: Definition & Formation

Some bacteria have the ability to enter a state of suspended animation when conditions are unfavorable. In this lesson, we will examine the bacterial endospore and learn how and why bacteria produce these structures.

Bacterial Plasmids: Definition, Function & Uses

9. Bacterial Plasmids: Definition, Function & Uses

What if you could pick up bits of DNA and change your traits? In the animal kingdom, organisms are born with their lifetime total of DNA. In the bacterial world, cells can add to their genome by acquiring plasmids.

Bacterial Conjugation: Definition & Protocol

10. Bacterial Conjugation: Definition & Protocol

You probably didn't know that bacteria can engage in sexual reproduction. It is not what you think. In this lesson we will explore the process of bacterial conjugation and its impact on genetic variability in bacteria.

Bacterial Transformation: Definition, Process & Applications

11. Bacterial Transformation: Definition, Process & Applications

DNA is all around you. So are bacteria. Did you know that those bacteria can pick up and use that DNA? In this lesson we will examine the process of transformation and how bacteria are able to make use of environmental DNA.

Bacterial Transduction: Definition, Process & Advantages

12. Bacterial Transduction: Definition, Process & Advantages

Genetic diversity allows organisms to adapt to changing environmental conditions. In this lesson, we will explore bacterial transduction and how it allows bacteria to transfer genes and increase genetic diversity.

What Is Diphtheria? - Cause, Symptoms & Treatments

13. What Is Diphtheria? - Cause, Symptoms & Treatments

This lesson will discuss a bacterium known as Corynebacterium diphtheria, the disease diphtheria, exotoxins, endotoxins, A-B toxins, pseudomembranes, bull-necks, and more!

Antibiotic Resistance: Definition, Types & Problems

14. Antibiotic Resistance: Definition, Types & Problems

If you have a bad bacterial infection, what do you do? Go to the doctor and get antibiotics, of course. But, what if antibiotics don't work anymore because the bacteria are antibiotic-resistant? In this lesson, learn how bacteria can become resistant to antibiotics and why this is such a big problem.

What Is a Foodborne Illness? - Definition and Common Types

15. What Is a Foodborne Illness? - Definition and Common Types

In this lesson we will discuss illness caused by consuming contaminated foods. This will include defining the little known difference between food poisoning and food infection.

Bioremediation: Microbes Cleaning Up the Environment

16. Bioremediation: Microbes Cleaning Up the Environment

Bioremediation uses living organisms to clean up pollution. In this lesson, we will examine the role of microbes in bioremediation and why it is not a perfect solution for degrading environmental pollutants.

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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