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Label the three tiers 1, 2, 3 given in the above age pyramid. - Biology

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प्रश्न


Label the three tiers 1, 2, 3 given in the above age pyramid.

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उत्तर

  1. represents Pre-reproductive age group
  2. represents Reproductive age group
  3. represents Post-reproductive age group 
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अध्याय 13: Organisms and Populations - SHORT ANSWER [पृष्ठ ९३]

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एनसीईआरटी एक्झांप्लर Biology [English] Class 12
अध्याय 13 Organisms and Populations
SHORT ANSWER | Q 10.a. | पृष्ठ ९३

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

Give an account of population regulation.


Measures of ‘Central tendency’ refer to:


Nutrient enrichment of water body result.


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


`"dN"/"dt" = "rN" (("K"- "N")/"K")` in logistic growth "K" represents:


What parameters are used for tiger census in our country’s national parks and sanctuaries?


Which one of the following organisms reproduces sexually only once in its lifetime?


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



What type of population growth is represented by the above age pyramid?


Draw an age pyramid for the ‘zero population growth rate’.


List any four characters that are employed in human population census.


The following diagrams are the age pyramids of different populations. Comment on the status of these populations.


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.


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:

  1. Birth rate and death rate
  2. Male and female
  3. Birth and death
  4. 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.


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