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Chapter 36: Problem 28

Explain the correlation between age structure and the level of economic development observed in many countries. a. There is no correlation between the characteristics of age structures and the level of economic development. b. Countries that are more economically developed tend to have fewer middle- aged individuals and more young individuals than undeveloped countries. c. A larger ratio of very young individuals to very old individuals characterizes the age structures of countries with the highest economic development. d. Age structures of economically undeveloped countries show greater proportions of children and fewer proportions of elderly people.

Short Answer

Expert verified
Option D is correct. Economically undeveloped countries have greater proportions of children and fewer elderly people.

Step by step solution

01

- Understanding Age Structure

Age structure refers to the distribution of various age groups in a population. It is often portrayed as a population pyramid. Economically developed countries tend to have different age structures compared to economically undeveloped countries.
02

- Analyze Each Option

Review the given options to find the correct correlation.
03

Option A Analysis

Option A states there is no correlation, which contradicts demographic studies that suggest economic development is linked to age structure.
04

Option B Analysis

Option B claims that more economically developed countries have fewer middle-aged individuals and more young individuals. However, economically developed countries often have lower birth rates and higher longevity, so this is incorrect.
05

Option C Analysis

Option C suggests that highly economically developed countries have more young individuals compared to old ones. This is contrary to observation, as developed countries tend to have aging populations.
06

Option D Analysis

Option D states that economically undeveloped countries have more children and fewer elderly people, which is supported by data showing higher birth rates and lower life expectancy in these countries.
07

- Conclusion

Based on the above analysis, the correct statement is supporting the correlation between economic development and age structure in undeveloped countries, which shows more children and fewer elderly people.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Age Distribution
Age distribution refers to the proportion of individuals of different ages within a population. It is crucial for understanding demographic makeup. This can greatly vary between countries with different levels of economic development. Economically developed countries typically have more balanced age distribution with significant portions of the population in adulthood, thanks to lower birth rates and higher life expectancy. In contrast, less developed countries often have a higher proportion of younger individuals due to higher birth rates and lower life expectancy.
Economic Development
Economic development relates to the increase in a country's wealth and standard of living. As economies grow, they often see improvements in healthcare, education, and infrastructure, leading to better life expectancy and reduced birth rates. Developed countries enjoy advanced healthcare systems, which contribute to longer life spans. Additionally, urbanization and better education typically result in smaller family sizes, impacting age distribution. Understanding this correlation helps in planning and policy-making to sustain economic growth and age structure balance.
Population Pyramid
A population pyramid is a graphical representation that shows the distribution of various age groups in a population, divided into males and females. The shape of the population pyramid can tell us a lot about a country鈥檚 age structure and economic development. In less developed countries, the pyramid often has a wide base, indicating a large number of young people. As development increases, the pyramid tends to become more columnar and even inverted, showing higher proportions of middle-aged and elderly people. This shift reflects lower birth rates and higher life expectancy.
Birth Rates
Birth rates are the number of live births per thousand people per year. They are an important indicator in shaping the age structure of a country. In economically undeveloped countries, birth rates are usually high due to factors like limited access to contraceptives, cultural norms that encourage large families, and higher infant mortality rates which could lead parents to have more children. Conversely, developed countries often exhibit lower birth rates due to better access to family planning, higher education and employment for women, and overall better economic stability.
Life Expectancy
Life expectancy refers to the average number of years a person can expect to live. It is typically higher in more economically developed countries due to better access to healthcare, nutrition, and living conditions. This contributes to a higher proportion of elderly individuals in these populations. On the other hand, less developed countries face more challenges like disease, poor healthcare, and insufficient nutrition, leading to shorter life expectancies and a higher proportion of younger individuals in the population.

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Most popular questions from this chapter

Different species have different survival curves. A Type III survival curve would most likely be observed for _____. a. whales b. seals c. salmon d. polar bears

If a population moves to a new environment rich in resources, what type of growth curve will it exhibit? a. logistic b. logical c. experimental d. exponential

Suppose a population of lizards becomes divided into two groups on two different islands after a devastating tsunami. No predators of the lizard are present on one island, and on the other island is a fierce predator that uses the lizard as its primary source of food. Assuming both populations encounter similar environments in every other way, and both survive and grow over the next 100 years, how do you predict any of the characteristics of the two lizard populations to differ at the end of that time? Give specific examples to explain your prediction. a. The lizards on the island with no predators will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they are adapted to other predators. b. The lizards that survive the fierce predator will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they are adapted to other predators. c. The lizards that survive the fierce predator will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because this predator is not a factor in their survival. d. The lizards on the island with no predators will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they have survived this predator

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Explain what would happen if the competitive exclusion principle were violated. a. One species will prey on another species and drive it to extinction. b. One species will adapt to another species invading its habitat. c. One species will block another species鈥� access to a critical resource. d. One species will contend with another species for the same resources.
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