Ch 30: Biodiversity Over Time

About This Chapter

Learn all about changes in biodiversity over time using this chapter's entertaining lessons, multiple-choice quizzes and practice exam. These study resources strengthen your knowledge while enhancing your ability to pass a test that examines this subject.

Biodiversity Over Time - Chapter Summary

Various forms of life on Earth have changed significantly over time. This chapter takes a close look at this change in biodiversity by examining the origin of life on Earth, the evolution of vascular plants, the concept of extinction and much more. Review fun lessons to study this subject and enhance your ability to:

  • Describe the origin and history of life on Earth
  • Provide details about the early evolution of mammals and evolution of vascular plants
  • Explain how paleontology, biogeography and embryology provide evidence for evolution
  • Define extinction and mass extinction
  • List types and characteristics of fossils and define a fossil record
  • Share the definitions of absolute age and relative age
  • Discuss fossil evidence for biological diversity, speciation and mass extinction
  • Differentiate between divergent and convergent evolution

This chapter enables you to study changes in biodiversity over time without setting foot in a traditional classroom. Review fun lessons online and easily send your lesson topic questions to our subject-matter experts via your computer or mobile device. Before, during, or after reviewing the lessons, gauge your comprehension of their content using their self-assessment quizzes. Find out how much you understand about the entire chapter by taking the practice chapter exam.

12 Lessons in Chapter 30: Biodiversity Over Time
Test your knowledge with a 30-question chapter practice test
The Origin of Life on Earth: Theories and Explanations

1. 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.

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

2. 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.

The Origin & Early Evolution of Mammals

3. The Origin & Early Evolution of Mammals

In this lesson, we'll explore the ancestry and evolution of mammals and discover how reptiles hundreds of millions of years ago ended up evolving into one of the most successful orders of animals in history. Then, you can test your understanding with a brief quiz.

The Evolution of Vascular Plants

4. The Evolution of Vascular Plants

This lesson will cover the basics of the earliest evolution of vascular plants, as well as why and how they came to be. Terms such as stomata, rhizoids, xylem, and phloem are defined.

Evidence for Evolution: Paleontology, Biogeography, Embryology, Comparative Anatomy & Molecular Biology

5. Evidence for Evolution: Paleontology, Biogeography, Embryology, Comparative Anatomy & Molecular Biology

There is much support for the theory of evolution. This evidence comes from a variety of scientific fields and provides information that helps us trace changes in species over time. In this lesson, we'll look at this evidence and explore how it supports the theory of evolution.

What Is Extinction? - Defining Background and Mass Extinction

6. What Is Extinction? - Defining Background and Mass Extinction

In this lesson you'll discover what the term 'extinction' means as well as learn the two different types of extinction: mass extinction and background extinction. You will also discover how humans contribute to extinction events.

Fossil: Definition, Types, Characteristics & Examples

7. Fossil: Definition, Types, Characteristics & Examples

Fossils provide scientists with many clues about Earth's history, offering evidence of dinosaurs and strange plants that existed in the past. This lesson will define a fossil, look at different types and characteristics of fossils, and then describe how fossils are formed.

Fossil Record: Definition & Examples

8. Fossil Record: Definition & Examples

This lesson teaches you about the fossil record. It explains how scientists learn about Earth's distant past and highlights what fossils can tell scientists about ourselves and other organisms.

Absolute Age: Definition & Dating

9. Absolute Age: Definition & Dating

Imagine braving the desert heat for days or even weeks as you dig for dinosaur bones. You find something extraordinary and want to know as much about it as you can. In this lesson, you'll learn how scientists determine the absolute age of materials.

What is Relative Age? - Definition & Effect

10. What is Relative Age? - Definition & Effect

How do geologists determine the age of different rock layers or fossils without the aid of modern equipment? Learn how geologists use rock layers to determine relative ages.

Fossil Evidence for Biological Diversity, Speciation, & Mass Extinction

11. Fossil Evidence for Biological Diversity, Speciation, & Mass Extinction

One of the best sources of evidence we have for evolution is the fossil record. Fossils provide a wealth of information on how species change over time and for exciting events like mass extinctions and new species formation.

Divergent & Convergent Evolution: Definitions & Examples

12. Divergent & Convergent Evolution: Definitions & Examples

Two types of macroevolution are essential to the understanding of evolutionary theory. Explore this lesson and learn more about convergent evolution and divergent evolution.

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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