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प्रश्न
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
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उत्तर
Analysis of age pyramids for human population can provide important inputs for long-term planning strategies. The different age groups present in a population determine its reproductive status.
Distribution of age groups highly influences the growth of the population. Each population displays following three ecological ages or age groups:
- Pre-reproductive
- Reproductive
- Post-reproductive
Population having large number of young members grow rapidly, while, the population bearing more number of post-reproductive members tends to be declining. There are basically three types of age pyramids found to be present in human population. These are as follows:
Therefore, through the thorough analysis of the age pyramids of a particular population, the distribution of resources can be done more efficiently. A better planning strategy can be adopted considering the demand of the resource; thus, long-term management of resources can be done in such a way that the population can derive maximum benefit with minimum effects on nature, leading the population to flourish efficiently.
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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.
Represent diagrammatically three kinds of age-pyramids for human populations.
Mention the different ways by which the population density of different species can be measured.
Population having large number of postreproductive and small number of prereproductive age group is called
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Deer
Write the best method to measure the population density of a single Banyan tree in comparison to Partlzenium weeds in a forest by an ecologist. Explain and justify your answer.
What would be the best method to measure the total population density of a dense bacterial culture in a petridish and why?
Important attributes belonging to a population but not to an individual are:
- Birth rate and death rate
- Male and female
- Birth and death
- Sex-ratio
Select the correct option from the given options:
With the help of neatly labelled diagrams, explain the different types of age pyramids of human population.
The number of lily plants in a pond was found to be 50. After one year, the number. increased to 65. Calculate the natality of lily plants.
