Question

What is an age-pyramid?


Name three representative kinds of age-pyramids for human population and list the

characteristics for each one of them.​

Answer 1

Answer:

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Explanation:

There are basically three types of age pyramids found to be present in human population. These are as follows: (i) Expanding or Triangular Age Pyramid : In this, number of pre-reproductive individuals is very lar ge, number of age reproductive individuals is moderate, while post-repr oductive individuals are fewer.

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Answer 2

The Age pyramid is the graphical illustration of the population by age group or gender.

• An age pyramid is also known as the age-sex pyramid which is a graphical representation of population by age group or sex.
• It is called so because of the shape it obtains when the population is growing.
• The three kinds of age pyramids are expansive, constrictive and stationary.
• Expansive is when the population pyramids show larger numbers or percentages of the population  in the younger age groups.
• The constrictive population pyramids display lower numbers or percentages of younger  people.
• The stationary age pyramids show almost an equal population of all age groups.