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Ch 19: Population Change in Biology

About This Chapter

Increase your understanding of population change in biology, including logistic population growth, population density, and exponential growth. If you are preparing for a test or class discussion, these lessons and quizzes will help raise your confidence by testing your knowledge of related topics in advance.

Population Change in Biology - Chapter Summary

As you go through these lessons on population change in biology, you will learn about factors that influence a population growth and graphic population growth of K-selected species. Population density and differences in growth patterns are also topics covered. By the end of the chapter, you should be ready to:

  • List factors that affect the size of human population
  • Explain how experts calculate population growth rates
  • Use a formula to determine change in population size
  • Find per capita growth rate of populations
  • Determine how many organisms can inhabit a particular habitat
  • Define exponential growth
  • List characteristics of open and closed populations
  • Discuss R-selected species

The engaging teaching style used by our educators will help you get up to speed on population change in biology in little time. A short quiz is available for each lesson to test your knowledge of concepts covered. You can also print the lesson quizzes and use them as study worksheets.

14 Lessons in Chapter 19: Population Change in Biology
Test your knowledge with a 30-question chapter practice test
The Human Population: Factors that Affect Population Size

1. The Human Population: Factors that Affect Population Size

The human population is constantly changing. In this lesson, we will explore the factors that cause increases and decreases in the human population, including births, deaths, immigration, and emigration.

Population Growth: Demographic Transition and Malthusian Theories

2. Population Growth: Demographic Transition and Malthusian Theories

Population growth is not as simple as watching the total number of humans rise each year. This lesson explores how the experts actually calculate population growth rates, and how different theories explain why various regions of the world experience population growth changes in such different ways.

Determining Change in Population Size: Formula & Examples

3. Determining Change in Population Size: Formula & Examples

Populations are always fluctuating. In this lesson, you will explore several examples to learn the formula needed to calculate the change in size of a population.

Population Growth Rate: Definition, Formula & Examples

4. Population Growth Rate: Definition, Formula & Examples

Population growth rate is an important factor to consider when looking at the past and future of a population. In this lesson, you'll learn how to calculate the growth rate.

How to Find Per Capita Growth Rate of Populations

5. How to Find Per Capita Growth Rate of Populations

When looking at growth rate of populations, calculating it in proportion to the actual population is very useful. This is what the per capita growth rate does. Learn more about it in this lesson.

Population Density: Definition, Formula & Examples

6. Population Density: Definition, Formula & Examples

When looking at population, one of the aspects you want to consider is population density. In this lesson you'll learn about the formula for calculating population density and see some examples using this formula.

Biotic Potential and Carrying Capacity of a Population

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.

Logistic Population Growth: Equation, Definition & Graph

8. Logistic Population Growth: Equation, Definition & Graph

Populations tend to get larger until there is no longer enough food or space to support so many individuals. This type of growth is called logistic population growth, and you can learn more about it in this lesson.

Exponential Growth: Definition & Examples

9. Exponential Growth: Definition & Examples

Exponential growth is growth that increases at a consistent rate, and it is a common occurrence in everyday life. In this lesson, learn about exponential growth and some of its real-world applications.

Open & Closed Populations: Characteristics & Differences in Growth Patterns

10. Open & Closed Populations: Characteristics & Differences in Growth Patterns

A population of a species can be described as either an open population or a closed population. Using examples, this lesson looks at the differences between these two types of populations. It then goes further to look at differences in their growth patterns.

Factors That Influence a Population Growth Curve

11. Factors That Influence a Population Growth Curve

There are multiple factors in the world that impact our population as well as the populations of every organism on the face of the earth. We will go over what a population is and the various factors that can affect a population.

R-Selected Species: Examples & Definition

12. R-Selected Species: Examples & Definition

Organisms have evolved two very different strategies for life and reproduction. In this lesson, we will examine one strategy called r-selection, and provide some examples of organisms that employ this strategy.

K-Selected Species: Definition & Examples

13. K-Selected Species: Definition & Examples

In this lesson, we'll examine one category of life history strategy, K-selection. Learn about the major characteristics of K-selection and some species that employ this strategy.

Graphing Population Growth of R-Selected & K-Selected Species

14. Graphing Population Growth of R-Selected & K-Selected Species

Every organism faces trade-offs in life, especially when it comes to how they are going to allocate their energy. In this lesson, we're going to talk about two different strategies for growth and reproduction and how they relate to population growth.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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