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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
Construct an age pyramid which reflects a stable growth status of human population.
List the attributes that populations but not individuals possess.
Animals that can move from fresh water to sea called as ________.
Measures of ‘Central tendency’ refer to:
Population having large number of postreproductive and small number of prereproductive age group is called
List any four characters that are employed in human population census.
Comment on the following figures: 1, 2 and 3:
A, B, C. D, G, P, Q, R, S are species
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?
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.
