About This Chapter
Principles of Evolution & Natural Selection - Chapter Summary
One of the most significant concepts in the scientific field of biology is the theory of evolution and natural selection. This chapter contains several online video and text lessons that cover major topics related to these theories. Included in these lessons are information on the fossil record, genetics and evolution, and adaptation. You will learn about essential components of these theories and scientific figures associated with them. Specific topics you will learn about are:
- The theory of evolution
- Hardy Weinberg Equilibrium
- Charles Darwin's theory of natural selection
- Natural selection and adaptation
- Different types of natural selection
You can answer questions in the chapter's practice quizzes and final exam to ensure that you have understood major topics related to this subject. For clarification on specific points, the chapter offers you the opportunity to message the lesson instructors directly. Your personal Dashboard allows you to track your learning progress as you go through this chapter.
1. 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.
2. Hardy-Weinberg Equilibrium: Definition, Equation & Evolutionary Agents
In this lesson we will define Hardy-Weinberg equilibrium and break down the Hardy-Weinberg equation to figure out if a population of hypothetical beetles is evolving.
3. Darwin's Theory of Natural Selection: Overview
In this lesson, you'll be introduced to Charles Darwin and his theory of natural selection. You'll also learn a bit about how his ideas impacted science, popular understandings of human origins, and the debate his theories have sparked.
4. Natural Selection & Adaptation: Definition, Theory & Examples
How does natural selection help shape the amazing types of animals we witness around us? In this lesson, we'll explore adaptations and what they can tell us about a species' past evolution.
5. Natural Selection: Definition, Types & Examples
We'll take a look at the types of natural selection that can occur. From flying hamsters to moths, you'll start to grasp the different paths organisms can take as they respond to their changing environments over time.
6. Artificial Selection in Evolution
Humans have been selectively breeding for desirable traits in plants and animals for a long time. This artificial selection allows for a lot of control in the breeding process but can also lead to unintended mutations within a population of organisms.
7. 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.
8. The Human Fossil Record & Human Evolution
Fossils can help tell the story of how we evolved. This lesson sheds light on our closest relatives from the past and what traits human beings have developed over time. You'll learn about those species that are extinct but who live on in our genes.
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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