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Which option gives the correct difference between population growth and sex ratio?

Answer and explanation

Correct answer: Population growth is the change in population size over time, whereas sex ratio is the number of females per 1,000 males

The direct answer is A. Population growth describes how the size of a population changes during a period. This change can result from births, deaths and migration, so it is not simply a count of births. Sex ratio is a composition measure showing the number of females per 1,000 males in the convention used here. Thus, growth asks, “How is the total population changing over time?” while sex ratio asks, “What is the balance between females and males?” Option A gives both definitions correctly. Option B reverses the two ideas: male-female comparison is related to sex ratio, not population growth, and total-population change is growth, not sex ratio. Option C is wrong because growth also involves deaths and migration, while sex ratio is not a death rate. Option D again reverses the definitions and wrongly calls sex ratio population density. Memory cue: growth means change through time; sex ratio means composition by sex.

Related tags

Population GrowthSex RatioPopulation CompositionDemographic IndicatorsPopulationGeographyClass 9 Mcq

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