Question

An age structure diagram shows the distribution of various age groups in a population of a country. It can be used to predict how the population size will change over time.
Which best describes an age structure diagram of a rapidly increasing population?

• A. A rectangular shaped diagram that has an equal distribution of males and females at all ages.
• B. A rectangular diagram with wider bands in the middle that shows a large population of males and females in the post-reproductive years.
• C. A pyramid shaped diagram that has a large population of males and females in the pre-reproductive years.
• D. An hourglass shaped diagram that has a large number of males and females in the pre-reproductive and post-reproductive years and low populations in the reproductive years.
• E. An upside-down pyramid that has a larger population of females in the post-reproductive years.

Answer 1

Answer: (C)

The proportions of different age groups in the population of any organism is called age pyramid. In triangular age pyramid, number of pre-reproductive individuals is very large, number of reproductive individuals is moderate and post-reproductive individuals are fewer. This type of age pyramid shows that population is growing.

So, the correct answer is 'A pyramid shaped diagram that has a large population of males and females in the pre-reproductive years'.