Biology Forums - Study Force

Examine the age pyramids shown below.

A) Describe the shape of the age pyramid for each country.

B) For each country, which would be greater—the birth rate or the death rate? Explain your answer.

C) Explain how the age structure of each population would affect the population’s size over time.

Left:

Constrictive population pyramids display lower numbers or percentages of younger people.

Population growth is negative.

Middle:

Expansive population pyramids show larger numbers or percentages of the population in the younger age groups, usually with each age group larger in size or proportion than the one born before it.

Population growth is rapid.

Right:

Concave sides indicate a high death rate and convex sides indicate a low death rate. This population pyramid exhibits concave sides indicating a high death rate.

Thank you very much!