About This Chapter
Origin of Life & Organic Evolution - Chapter Summary
This chapter is designed to quickly strengthen your comprehension of the origin of life and organic evolution. Review engaging lessons developed by top instructors to improve your understanding of speciation, genetic variability, the history of evolution and other related topics. Completing this chapter will enable you to:
- List and discuss theories explaining the origin of life on Earth
- Explain the theory of evolution and the evolutionary relationships of organisms
- Discuss Hugo de Vries' mutation theory of evolution
- Define and describe genetic variability and random mutation
- Share the meaning of speciation and its role in evolution
- Provide details about biotic potential and the carrying capacity of a population
- Describe the history of animal and human evolution
- Detail how paleontology, biogeography and other scientific fields support the theory of evolution
You can tailor the resources in this chapter to your personal study needs and schedule. Access the lessons anytime using any computer, smartphone or tablet with an Internet connection to better understand the origin of life and organic evolution. When ready, assess your comprehension of the lessons you review by taking their accompanying quizzes. Any questions that arise while studying this chapter can be submitted to our experts via the Dashboard.
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.
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.
3. The Evolutionary Relationships of Organisms
In this lesson, we will discuss what evolutionary relationships mean, how we describe them, and how we determine them using morphological and molecular data. We will learn how the molecular clock determines our relationships by tracing random mutations.
4. Hugo de Vries' Mutation Theory
In the late 1800s, scientists were working to figure out how species evolve over time. Hugo de Vries presented information from evening primrose plants and developed mutation theory to help answer this question.
5. Genetic Variability and Random Mutation
Evolution is driven by variation among populations. The amount of variability determines how well a population can adapt to environmental changes, while random mutations can provide new variations that help a population adapt to unexpected changes.
6. Speciation: Definition, Examples & Role in Evolution
Can you believe that over two million species have been identified on Earth? Have you ever wondered how so many species formed on Earth? Learn more about how new species form and test your knowledge with a quiz.
7. Biotic Potential and Carrying Capacity of a Population
When you look around, you can see a number of different individuals and species. In this lesson, we will explore the factors that control and define how many organisms can really inhabit a particular ecosystem or habitat.
8. The History of Animal & Human Evolution
Animals, including humans, have a vast, complex evolutionary history. In this lesson, we will look at the evolution of animals, including invertebrates and vertebrates.
9. 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.
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