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Ch 31: Classification of Living Organisms

About This Chapter

Use these brief video and text lessons as a tool to help you learn more about how living things are described, classified, and named. The material presented here can help you prepare for exams, improve your grades, or just increase your knowledge.

Classification of Living Organisms - Chapter Summary

In this chapter you will learn about the classification systems that biologists use to make sense out of the vast array of living things surrounding us. The lessons will teach you about Carolus Linnaeus, the system of nomenclature and taxonomy that he developed, and will show you how it all fits together. You will explore the tree of life, see how species are related to each other through evolutionary pathways, and learn how phylogenetic trees and cladograms are used. Upon successful completion of the chapter, you should be able to:

  • Understand how living things are classified and named
  • Describe Carolus Linnaeus's achievements in taxonomy and biology
  • Identify the domains of the Tree of Life
  • Explain how scientists use cladograms and phylogenetic trees
  • Define and create diagrams of evolutionary relationships

The short duration of these lessons allows you to fit them easily into your busy schedule, while the readily-accessible online platform allows you to study at your convenience and at your own pace. Each lesson is accompanied by a short quiz that enables you to reinforce and check what you've learned, while the chapter test gives you a way to gauge your overall mastery of the material.

5 Lessons in Chapter 31: Classification of Living Organisms
Test your knowledge with a 30-question chapter practice test
Taxonomy: Classification and Naming of Living Things

1. Taxonomy: Classification and Naming of Living Things

The name you give to a living thing may be completely different than the name someone else uses. In science, we use a common naming system for all living things to avoid confusion. This lesson will explore the basics of our classification system.

Carolus Linnaeus: Classification, Taxonomy & Contributions to Biology

2. Carolus Linnaeus: Classification, Taxonomy & Contributions to Biology

There are millions of species on Earth. How can we name and organize all of them without getting confused? We use a system developed in the 1700s by Carolus Linnaeus. Learn more about him and his contributions in this lesson.

Tree of Life Domains: Bacteria, Archaea & Eukarya

3. Tree of Life Domains: Bacteria, Archaea & Eukarya

In this lesson we will consider how all the organisms on Earth are related to one another and the favored hypothesis for how all these organisms fit into three broad categories called domains.

Cladograms and Phylogenetic Trees: Evolution Classifications

4. Cladograms and Phylogenetic Trees: Evolution Classifications

Family trees help show how people are related to each other. Similarly, scientists use cladograms and phylogenetic trees to study the relationships between organisms.

Evolutionary Relationships: Definition & Diagram

5. Evolutionary Relationships: Definition & Diagram

Just like you can build a family tree to show the relationships of your ancestors and their descendants, scientists can build trees to show the evolutionary relationships of species. In this lesson, learn how to interpret these evolutionary trees.

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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