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Origin & Evolution of Life - Chapter Summary
While studying these lessons, you will heighten your understanding of the origin and evolution of life. Some of the topics covered include the Hardy-Weinberg equilibrium, gene flow, and genetic drift. This chapter will also look at evidence for evolution. After reviewing the lessons, you should be ready to do the following:
- Explain how living things come from non-living things
- Describe interactions between population, genetics and the environment
- Discuss changes in species over time
- Recall differences in the evolutionary theories of Darwin and Mendel
- List types of natural selection
- Explain how a population adapts to environmental changes
- Discuss what adaptations tell us about past evolution
- Describe the connection between humans and primates
These lessons will help you quickly grasp concepts related to the origin and evolution of life. Key words are highlighted in bold for quick reference. A brief quiz is available to test your knowledge after each lesson, and the quizzes can be printed for use as a study tool.
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. 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.
4. Modern Evolutionary Synthesis: Definition & Formation
In this lesson, we will discuss the history of evolutionary theory. We will focus on Darwin and Mendel, discussing why some scientists initially believed these two revolutionaries were incompatible, and how these problems were resolved.
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. 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.
7. 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.
8. Gene Flow: Definition & Examples
Chances are you've probably witnessed gene flow today! This lesson will define gene flow and give examples. It will also explain why gene flow creates genetic diversity.
9. Genetic Drift: Definition, Examples & Types
Genetic drift reduces genetic variability of a population by decreasing the size of the population. The change in population size and variability often leads to new species and unique populations.
10. 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.
11. The Evolution of Humans: Characteristics & Evolutionary History
Just like other organisms, humans have changed over time. We will look at the evolution of humans as well as connections with our primate relatives, including Old World and New World primates.
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Other chapters within the ISC Biology: Study Guide & Syllabus course
- Microscopes Basics & Techniques
- Classification & Diversity of Life
- Kingdom Monera, Protista & Fungi
- Classification in the Animal Kingdom
- Overview of Vertebrates
- Classification in the Plant Kingdom
- Plant Physiology: Growth & Nutrition
- Plant Tissue: Structure & Function
- Absorption & Movement of Water in Plants
- Plant Morphology
- Reproduction of Flowering Plants
- Mechanisms of Photosynthesis
- Mechanisms of Cellular Respiration
- Cell Structure Overview
- Cell Membrane Basics
- DNA Basics
- Recombinant DNA & Its Applications
- Overview of Basic Genetic Principles
- Chromosomes & Genetics
- The Cell Cycle, Mitosis & Meiosis
- Overview of Biomolecules
- Enzyme Mechanisms
- Animal Tissue: Structure & Function
- Nutrition & the Digestive System
- Human Respiratory System Overview
- Basics of the Circulatory System
- Excretory System Overview
- Endocrine System Overview
- Basics of the Nervous System
- The Musculoskeletal System
- Human Reproduction & Development Basics
- Human Disease & Defense
- Overview of Ecosystems
- Community Ecology Overview
- Overview of Biodiversity
- Environmental Biology Overview
- Biological Applications in Agriculture
- ISC Biology Flashcards