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Ch 12: Holt McDougal Biology Chapter 12: The History of Life

About This Chapter

The History of Life chapter of this Holt McDougal Biology Companion Course helps students learn the essential lessons associated with the history of life. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the History of Life textbook chapter.

How It Works:

  • Identify the lessons in the Holt McDougal History of Life chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the history of life 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 about:

  • Fossils as evidence
  • Relative dating with fossils
  • Radiometric and radiocarbon dating methods
  • The geologic time scale
  • The history and major eras of planet Earth
  • Cyanobacteria
  • The endosymbiosis theory
  • Sexual reproduction's evolution
  • Primates and humans
  • Human evolution

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

11 Lessons in Chapter 12: Holt McDougal Biology Chapter 12: The History of Life
Fossil Evidence: Definition & Overview

1. Fossil Evidence: Definition & Overview

Fossils are critical tools in science because they give us clues to the types of plants and animals that lived on Earth in the past. In this lesson, you will learn about the types of fossils and how they were formed.

Relative Dating with Fossils: Index Fossils as Indicators of Time

2. Relative Dating with Fossils: Index Fossils as Indicators of Time

You may already know how to date a fossil with a rock. But did you know that we can also date a rock with a fossil? Watch this video to find out how we use index fossils to establish the relative ages of rocks.

Radiometric Dating: Methods, Uses & the Significance of Half-Life

3. Radiometric Dating: Methods, Uses & the Significance of Half-Life

Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes. Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson.

Geologic Time Scale: Major Eons, Eras, Periods and Epochs

4. Geologic Time Scale: Major Eons, Eras, Periods and Epochs

The geologic time scale is an essential tool for understanding the history of Earth and the evolution of life. In this lesson, explore the principal eons, eras, periods, and epochs that help us track major events in geologic history.

The Origin of Life on Earth: Theories and Explanations

5. The Origin of Life on Earth: Theories and Explanations

Ever wonder how living things came from non-living things? We will explore what conditions on early Earth may have created life from non-living items.

Cyanobacteria: Definition, Characteristics & Species

6. Cyanobacteria: Definition, Characteristics & Species

Cyanobacteria are a phylum of Bacteria that produce oxygen during photosynthesis. This lesson will examine cyanobacteria and the role they played in establishing our oxygen-rich atmosphere.

The Endosymbiosis Theory: Evolution of Cells

7. The Endosymbiosis Theory: Evolution of Cells

Ever wonder why some cells are very simple and others are complex with countless organelles to remember? We will look at how simple cells evolved to become more complex cells - as well as evidence to support this.

The Evolution of Sexual Reproduction

8. The Evolution of Sexual Reproduction

Sexual reproduction is one of two ways that organisms reproduce. In this lesson, we'll explore why sexual reproduction is so common as well as how it contributes to diverse populations.

The History of Life on Earth: Timeline and Characteristics of Major Eras

9. The History of Life on Earth: Timeline and Characteristics of Major Eras

The Earth is over 4.6 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.

Primates and Human Origin

10. Primates and Human Origin

You probably know that you are a primate, just like gorillas and monkeys. But you may be surprised to find out how long primates have been around and how many of them are still living on Earth, which are covered in this lesson.

The Evolution of Humans: Characteristics & Evolutionary History

11. The Evolution of Humans: Characteristics & Evolutionary History

Just like other organisms, humans have changed over time. We will look at the evolution of humans as well as connections with our primate relatives, including Old World and New World primates.

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