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प्रश्न
How does an age pyramid for human population at given point of time helps the policy-makers in planning for future.
उत्तर
The structure of the age pyramid determines the growth status of the population, that is, whether it is growing, stable or declining. On the basis of the collective information, the polices for the population can be decided. These may emphasise on providing food to the population, development of proper health services and much more.
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संबंधित प्रश्न
(a) Name the two growth models that represent population growth and draw the respective growth curves they represent.
(b) State the basics for the difference in the shape of these curves
(c) Which one of the curves represents the human population growth at present? Do you think such a curve is sustainable? Give reason in support of your answer.
Answer the following question.
"The size of a population for any species is not a static parameter." Justify the statement with specific reference to fluctuations in the population density of a region in a given period of time.
Mention the different ways by which the population density of different species can be measured.
The phenomenal and rapid increase of population in a short period is called ______.
Population having large number of postreproductive and small number of prereproductive age group is called
Which of the following would necessarily decrease the density of a population in a given habitat?
Define ‘zero population growth rate’. Draw a age pyramid for the same.
Comment on the following figures: 1, 2 and 3:
A, B, C. D, G, P, Q, R, S are species
The following diagrams are the age pyramids of different populations. Comment on the status of these populations.
What would be the best method to measure the total population density of a dense bacterial culture in a petridish and why?
