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Ch 26: Campbell Biology Chapter 26: Phylogeny and the Tree of Life

About This Chapter

The Phylogeny and the Tree of Life chapter of this Campbell Biology Companion Course helps students learn the essential lessons associated with phylogeny. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Phylogeny and the Tree of Life textbook chapter.

How It Works:

  • Identify the lessons in the Campbell Biology Phylogeny and the Tree of Life chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the phylogeny 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:

  • The purpose of cladograms and phylogenetic trees
  • The difference between homologous and analogous structures
  • The methods of maximum parsimony and likelihood
  • Types of homologous genes
  • Uses of molecular clocks
  • The horizontal gene transfer process

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6 Lessons in Chapter 26: Campbell Biology Chapter 26: Phylogeny and the Tree of Life
Test your knowledge with a 30-question chapter practice test
Cladograms and Phylogenetic Trees: Evolution Classifications

1. 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.

Homologous Structures: Comparison of Body Structures Across Species

2. Homologous Structures: Comparison of Body Structures Across Species

Did you know that you share the same structures as a monkey? Okay, you may have guessed that, but what about a whale or a bat? Learn about similarities in bone and muscle structure in this lesson that covers body shape across species.

Maximum Parsimony & Likelihood Methods in Phylogeny

3. Maximum Parsimony & Likelihood Methods in Phylogeny

How are living things related? That's the question behind phylogeny. In this lesson, we are going to explore the concept of phylogeny as well as scientists create phylogenetic trees of life and test their accuracy.

Homologous Genes: Definition & Types

4. Homologous Genes: Definition & Types

Have you ever wondered why we share certain traits with creatures that are seem to be pretty unrelated to us? In this lesson, we will explore the concept and types of homologous genes and discover how this process occurs.

Molecular Clocks: Definition, Uses & Problems

5. Molecular Clocks: Definition, Uses & Problems

Molecular clocks help us tell time on an evolutionary scale instead of by minutes or hours. This video lesson will teach you about molecular clocks, how they are useful, and what problems still remain.

Horizontal Gene Transfer: Definition & Process

6. Horizontal Gene Transfer: Definition & Process

How can we pass on our DNA, other than to our children? Is there any other way to pass on genetic material other than through reproduction? The answer may surprise you as we explore horizontal gene transfer.

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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