Ch 4: GED Science: Life Sciences

About This Chapter

With this chapter, you can rediscover the definition of nutrition along with basics of genetics, including heredity, and more by watching lessons about life sciences for the science portion of the GED exam. Take brief quizzes at the end of each lesson.

GED Science: Life Sciences - Chapter Summary

In this chapter, you will be introduced to interesting lessons that will help you review various life sciences topics for the science part of the GED exam. You can brush up on the reactions of photosynthesis, the theory of evolution, and additional subjects. They include the following:

  • Summary of cells
  • Definition of human body systems and DNA
  • Basics of genetics, including heredity
  • Example of the Punnett square
  • Food chains and energy flow in an ecosystem
  • Definition of nutrition

There are multiple-choice quizzes at the end of each lesson to help you test your understanding. View this mobile-friendly chapter on any device. Worksheets are available for printing out to allow you to study when you're not near your device.

9 Lessons in Chapter 4: GED Science: Life Sciences
What are Cells? - Overview

1. What are Cells? - Overview

All living organisms are made up of cells, but do you know what a cell is? In this lesson, you can learn about the three main structures that all cells contain and about the two major types of cells.

Photosynthesis: Definition & Reactions

2. Photosynthesis: Definition & Reactions

Some people may falsely assume plants to be weaker than animals. However, plants and a few other organisms harness light energy from the sun to feed the rest of us. This lesson will introduce you to how they do it.

What are the Human Body Systems?

3. What are the Human Body Systems?

There are ten organ systems in your body that each have different functions. They all must work together to keep you alive and healthy. In this lesson, you will learn about each of these body systems, both what they do and which organs they contain.

What is DNA?

4. What is DNA?

In this lesson, we will learn what DNA is, what its characteristics and functions are, even where it is located and what information it contains. We'll also learn how the double helix is created. Find out more.

Fundamentals of Genetics: Reproduction & Heredity

5. Fundamentals of Genetics: Reproduction & Heredity

Your genes are unique and determine everything about you. In this lesson, we will learn what genes are, how they are inherited from your parents, and how to determine which traits will actually be expressed if you inherit a certain combination of genes.

Punnett Square: Definition & Example

6. Punnett Square: Definition & Example

This lesson will define what a Punnett square is and show several examples of how one can be used. It will also briefly describe patterns of inheritance.

Theories of Evolution: Lamarck vs. Darwin

7. 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.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

8. Food Chains, Trophic Levels and Energy Flow in an Ecosystem

In this lesson, you'll learn about food chains, food webs, and the different roles that organisms play in an ecosystem. You'll also learn about how energy flows through an ecosystem.

What is Nutrition?

9. What is Nutrition?

Nutrition is the process of taking in nutrients from the foods you eat. Learn about the six nutrients needed for energy, maintenance of tissues and regulation of bodily processes: carbohydrates, fats, proteins, water, vitamins and minerals.

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