Which statement regarding the two population pyramids below is true?

A) The population pyramid on the left demonstrates rapid population growth

B) Both population pyramids are typical of peripheral nations

C) The mortality rate is similar to the fertility rate for the country whose

population is represented by the pyramid on the right

D) Migration or high fertility rates may account for the population pyramid on

the right

Click to reveal answer

The population pyramid on the right has a wide base with a very

narrow apex, indicating that the population overall is skewed towards younger

individuals. There are many reasons why a population pyramid might be skewed

towards the younger age ranges, including high fertility rates (leading to large

numbers of babies and young children) or the presence of migration. While

migration can increase the population of young individuals, old individuals, or both,

it certainly would be theoretically capable of producing a population pyramid

like the one shown on the right, especially if mostly younger (and more mobile)

individuals are the ones migrating. For these reasons, Answer D is correct.

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Day 153 MCAT Practice Question