Q. 3 B5.0( 4 Votes )
Answer the following questions in not more than 150 words.
Discuss the factors responsible for imbalances in the sex-age found in different parts of the world and occupational structure.
The age-sex structure of a population refers to the number of females and males in different age groups. The two variables are represented in a population pyramid, the shape of which reflects the characteristics of the population
Based on the shape of the pyramid, there are three trends observable in any population, these are:
Expanding Population: represented in a triangular shaped pyramid with a wide base, is typical of less developed countries. These have larger populations in lower age groups due to high birth rates.
Constant Population: represented by a bell-shaped pyramid that tapers towards the top. Such populations have almost equal birth and death rates, leading to a near constant population.
Declining Population: represented by a narrow base and a tapered top, such pyramids show low birth and death rates. The growth rate for such a population is usually zero or negative.
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