Which diagram shows the distribution of a population by age and gender?

Which diagram shows the distribution of a population by age and gender?

• A. Population Pyramid
• B. Population
• C. Pyramid of Numbers
• D. Potable Water

Answer: (A)

The diagram that shows distribution of a population by age and gender is the Population Pyramid. This diagram is built with age groups stacked along the vertical axis and two halves of bars across the horizontal axis representing different genders. Each horizontal bar shows how many people are in that age group, split by male and female. That combination lets you see both the age structure (how many young versus old people) and the gender balance at every age. This is useful because the shape of the pyramid tells you about population trends. A broad base means many young people and potential for growth, while a narrow top indicates fewer older people. Differences between the sides show how life expectancy or gender ratios vary by age. The other options don’t fit this purpose: a general population diagram would just show total numbers without age or gender details; a Pyramid of Numbers represents counts of organisms at different trophic levels in ecosystems, not human age and sex structure; and potable water relates to water quality, not population structure.

The diagram that shows distribution of a population by age and gender is the Population Pyramid. This diagram is built with age groups stacked along the vertical axis and two halves of bars across the horizontal axis representing different genders. Each horizontal bar shows how many people are in that age group, split by male and female. That combination lets you see both the age structure (how many young versus old people) and the gender balance at every age.

This is useful because the shape of the pyramid tells you about population trends. A broad base means many young people and potential for growth, while a narrow top indicates fewer older people. Differences between the sides show how life expectancy or gender ratios vary by age.

The other options don’t fit this purpose: a general population diagram would just show total numbers without age or gender details; a Pyramid of Numbers represents counts of organisms at different trophic levels in ecosystems, not human age and sex structure; and potable water relates to water quality, not population structure.