Ch 21: Evolution Overview: Tutoring Solution

About This Chapter

The Evolution Overview chapter of this High School Biology Tutoring Solution is a flexible and affordable path to learning about evolution. These simple and fun video lessons are each about five minutes long and they teach all of the evolutionary theory and evidence concepts required in a typical high school biology course.

How it works:

  • Begin your assignment or other high school biology work.
  • Identify the evolution concepts that you're stuck on.
  • Find fun videos on the topics you need to understand.
  • Press play, watch and learn!
  • Complete the quizzes to test your understanding.
  • As needed, submit a question to one of our instructors for personalized support.

Who's it for?

This chapter of our high school biology tutoring solution will benefit any student who is trying to learn about evolution and earn better grades. This resource can help students including those who:

  • Struggle with understanding rates of evolution, Hardy Weinberg Equilibrium, natural selection, speciation, genetic variability or any other evolution topic.
  • Have limited time for studying
  • Want a cost effective way to supplement their science learning
  • Prefer learning science visually
  • Find themselves failing or close to failing their evolution overview unit
  • Cope with ADD or ADHD
  • Want to get ahead in high school biology
  • Don't have access to their science teacher outside of class

Why it works:

  • Engaging Tutors: We make learning about evolution simple and fun.
  • Cost Efficient: For less than 20% of the cost of a private tutor, you'll have unlimited access 24/7.
  • Consistent High Quality: Unlike a live biology tutor, these video lessons are thoroughly reviewed.
  • Convenient: Imagine a tutor as portable as your laptop, tablet or smartphone. Learn about evolution on the go!
  • Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.

Learning Objectives

  • Become familiar with the theory of evolution.
  • Discuss the evidence for evolution collected from various disciplines.
  • Learn about the rates of evolution.
  • Understand the Hardy Weinberg equilibrium equation and evolutionary agents.
  • Describe the different types of natural selection and understand how they contribute to adaptation.
  • Differentiate between allopatric and sympatric speciation.
  • Discuss the prezygotic and postzygotic barriers to speciation.
  • Learn how random mutations arise.
  • Take a look at peppered moths as an example of rapid adaptation.
  • Explain how artificial selection contributes to evolution, such as when farmers use artificial selection to grow preferred crops.

18 Lessons in Chapter 21: Evolution Overview: Tutoring Solution
Test your knowledge with a 30-question chapter practice test
Theories of Evolution: Lamarck vs. Darwin

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.

Evidence for Evolution: Paleontology, Biogeography, Embryology, Comparative Anatomy & Molecular Biology

2. 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.

Rates of Evolution: Punctuated Equilibrium & Molecular Clock Hypothesis

3. Rates of Evolution: Punctuated Equilibrium & Molecular Clock Hypothesis

In general, evolution is a very long process. But rates of evolution can be different for different organisms. In this video lesson, you will identify how scientists study rates of evolution and fill in some of the missing 'steps' in the fossil record.

Hardy-Weinberg Equilibrium I: Overview

4. Hardy-Weinberg Equilibrium I: Overview

In this lesson, we'll examine population genetics in greater detail. We'll also explore notions of Hardy-Weinberg equilibrium for large, stable populations. Is the genetic makeup of our flying hamster population changing? The Hardy-Weinberg equilibrium can serve as a reference point as we try to answer population genetics questions.

Hardy-Weinberg Equilibrium II: The Equation

5. Hardy-Weinberg Equilibrium II: The Equation

The Hardy-Weinberg equilibrium equation is represented by a polynomial, so we'll have to do some calculations. Don't be intimidated; a few coin tosses can help us make sense of allelic frequencies in a given gene pool.

Hardy-Weinberg Equilibrium III: Evolutionary Agents

6. Hardy-Weinberg Equilibrium III: Evolutionary Agents

In this lesson, you'll learn how the Hardy-Weinberg equation relates to different evolutionary agents and population changes. Discover how the equation may be used to discover populations that are not in equilibrium.

Natural Selection & Adaptation: Definition, Theory & Examples

7. 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.

Natural Selection: Definition, Types & Examples

8. 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.

Speciation: Allopatric and Sympatric Speciation

9. Speciation: Allopatric and Sympatric Speciation

Discover the definition of a species and learn more about how species split. Find out common terms related to the splitting of species and study what role polyploidy plays in the development of a species.

Prezygotic Reproductive Barriers & Speciation: Definition & Examples

10. Prezygotic Reproductive Barriers & Speciation: Definition & Examples

We may take for granted why animals choose to mate with other animals of similar appearance, but it's not that simple. There are actually biological barriers to reproduction that can prevent even seemingly closely related species from reproducing. This lesson looks at one such category of hindrances, prezygotic barriers, which make fertilization impossible.

Postzygotic Reproductive Barriers: Definition & Examples

11. Postzygotic Reproductive Barriers: Definition & Examples

Do flying hamsters represent a separate species from your run-of-the-mill hamsters? We'll get to the bottom of this by performing crosses between the two hamster types. You'll explore postzygotic reproductive barriers and their possibly tragic consequences.

Genetic Variability and Random Mutation

12. 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.

An Example of Rapid Adaptation: The Peppered Moths

13. An Example of Rapid Adaptation: The Peppered Moths

Normally, adaptations occur over thousands or millions of years. However, drastic changes in the environment can shorten the time period in which a change comes about. In such cases, we can learn a lot about the evolutionary process and how natural selection drives it forward.

Artificial Selection in Evolution

14. 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.

Character Displacement: Definition & Example

15. Character Displacement: Definition & Example

In this lesson, we'll explore the evolutionary phenomenon of character displacement. We'll learn how natural selection, as well as sexual selection, acts to reduce competition between similar species.

Convergent Evolution: Examples & Definition

16. Convergent Evolution: Examples & Definition

Can you tell whether species are related by looking at them? Organisms look and act the way they do because of various evolutionary processes. Convergent evolution can provide both insight and issues when studying relationships and structural similarities.

Punctuated Equilibrium: Definition, Theory & Examples

17. Punctuated Equilibrium: Definition, Theory & Examples

In this lesson, we'll take a look at the theory of punctuated equilibrium developed by the notable paleontologists Niles Eldredge and Stephen Jay Gould. We'll define punctuated equilibrium, explain its basic tenets and see some simple examples.

Sympatric Speciation: Example & Definition

18. Sympatric Speciation: Example & Definition

How do species evolve from a common ancestor, even if they live in the same location? Sympatric speciation is an evolutionary process that drives this type of division between species that occupy the same habitat.

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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