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The time required for a population to double is mainly related to what?

Answer and explanation

Correct answer: Population growth rate

Doubling time is the period required for a population to become twice its initial size. It is mainly determined by the rate at which the population grows. When growth is rapid, the population reaches twice its size sooner; when growth is slow, doubling takes longer. Births, deaths, and migration may all influence the growth rate used in a particular study.

Therefore, option A, population growth rate, is correct. In a simple constant-growth model, doubling time is often estimated by the rule of 70 divided by the annual percentage growth rate, though this is an approximation. Country area, distance from the sea, and elevation do not directly determine doubling time.

Related tags

Doubling TimeGrowth RatePopulation IncreaseDemographyPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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