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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.
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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
List the attributes that populations but not individuals possess.
Define the carrying capacity.
Study the flow chart given below and complete the equation that follows by identifying 1, 2, 3 and 4.
Nt + 1 = Nt + {(1+ 2) − (3 + 4)}
Animals that can move from fresh water to sea called as ________.
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:
Bacteria
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.
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:
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.
