Ch 29: Theories of Biology

About This Chapter

Learn more about the history of some of the major theories in biology along with many of the famous scientists who are credited with these important discoveries. Use these videos and quizzes to discover more about DNA, gene theory and evolution so you can be better prepared for your homework or future exams.

Theories of Biology - Chapter Summary

In this chapter, you'll be introduced to some of the famous scientists behind some of the major biological theories such as evolution, gene theory, and DNA. You'll learn about Charles Darwin and his evolutionary theories, voyages, and works on natural selection. You'll also be introduced to the lesser-known scientist Jean-Baptiste Lamarck, whose theories laid the groundwork for the study of evolution.

As you continue, you will learn more about Alfred Wallace, an evolutionary scientist who worked with the concept of contribution with regard to evolution. The Watson & Crick model of DNA and Francis Crick, one of the scientists credited with discovering DNA, will also be detailed in a lesson. Once you've reviewed this chapter, you'll understand:

  • What can be learned from the flying hamster experiment
  • Who Jean-Baptiste Lamarck was and how his theories have affected the study of evolution
  • What Alfred Wallace noticed about contribution with regards to evolution
  • Which scientist is known as the Father of Modern Genetics
  • What the Watson & Crick model of DNA looks like

Our engaging videos and quizzes are designed by professional instructors to ensure learning is quick and easy. While you're watching a video lesson, use the video tabs in the Timeline if you need to go back and re-watch just a portion of the video. Once you've reviewed the material, use the self-assessment quizzes to gauge your comprehension of the lesson.

8 Lessons in Chapter 29: Theories of Biology
Test your knowledge with a 30-question chapter practice test
Themes in Biology: Diversity, Interdependence & Evolution

1. Themes in Biology: Diversity, Interdependence & Evolution

Biology is broadly divided into three key themes: diversity, interdependence, and evolution. We'll describe each of these themes and explain their importance to understanding life as a whole. At the end, you can test your knowledge with a brief quiz.

Theories of Evolution: Lamarck vs. Darwin

2. Theories of Evolution: Lamarck vs. Darwin

We'll look at the interplay between population genetics and environment. Are traits individually acquired or do entire populations evolve? The flying hamsters and a few other notable experiments will provide the answers.

Charles Darwin: Voyages, Theories & Works

3. Charles Darwin: Voyages, Theories & Works

In this lesson we explore the life and voyages of the 19th-century British naturalist Charles Darwin and his formulation of the theory of natural selection.

Jean-Baptiste Lamarck's Theory of Evolution: Overview

4. Jean-Baptiste Lamarck's Theory of Evolution: Overview

You might know about Charles Darwin and his theory of evolution. However, it was the lesser known, yet influential, Jean-Baptiste Lamarck who put forth a theory that laid the early foundations for the study of evolution.

Alfred Wallace: Theory of Evolution & Contribution

5. Alfred Wallace: Theory of Evolution & Contribution

This lesson explores Alfred Wallace's interest in evolution, his study subjects, and the development of his ideas. You'll learn how Wallace noticed the distribution of different species of animals and explained why new species could arise.

Gregor Mendel & Genetics: Experiments, Laws & Discovery

6. Gregor Mendel & Genetics: Experiments, Laws & Discovery

Gregor Mendel is currently known as the Father of Modern Genetics. This lesson goes through a brief history of his life, workings as a scientist, and his findings.

Watson & Crick Model of DNA

7. Watson & Crick Model of DNA

This lesson will review the Watson & Crick model of DNA and how it applies to our understanding of genetic material. By the end you will understand what Watson and Crick discovered and explain what its structure looks like.

Francis Crick: DNA Discoveries, Overview

8. Francis Crick: DNA Discoveries, Overview

This lesson will discuss the life and scientific contributions of Francis Crick, a prominent English physicist and biochemist who was part of the team responsible for the discovery of the structure of the DNA molecule.

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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