Chapter 5, Problem 13STP

Summary Introduction

To explain:

The type of information that is displayed on an age structure graph.

Introduction:

The study of human population size, density, distribution, movement, and birth and death rates is demography. For many years, environmental conditions kept the size of the human population at a relatively constant number below the environment's carrying capacity. Human can alter the environment according to the conditions which increases their carrying capacity. Medicines and technological advances have improved the chances of human survival by reducing the number of deaths from parasites and diseases.

Explanation of Solution

Age structure is an important characteristic of any population. A population's age structure is the number of females and males in each of the three groups named as reproductive stage, pre-reproductive stage, and post-reproductive stage. Humans are considered to be pre-reproductive before age 20 even though they are capable of reproduction at an earlier age. The reproductive years are considered to be between 20 and 44, and the post-reproductive years are after age 44.

Conclusion

Thus, the age structure graph displayed the pre-reproductive, reproductive, and post-reproductive stages of males and females.