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प्रश्न
What is an age-pyramid?
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उत्तर
An age pyramid is a graphical representation of the distribution of various age groups within a population of a region forming the shape of a pyramid when the population is growing.
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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.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
Define the carrying capacity.
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Bacteria
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Banyan
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
Draw an age pyramid for the ‘zero population growth rate’.
Given below is the Age Pyramid of the population in one of the states in India as per 2011 census. It depicts the male population on the left-hand side, female population on the right-hand side, newborns towards the base and gradually increasing age groups as we move from base to the top, with the oldest population at the top. Study this pyramid and comment upon the appropriateness of the Assertion and the Reason.
Percentage to the total population
Assertion: It is a stable population.
Reason: The pre-reproductive and reproductive individuals are almost in equal numbers and the post-reproductive individuals are relatively fewer.
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.
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:
