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प्रश्न
Label the three tiers 1, 2, 3 given in the above age pyramid.
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उत्तर
- represents Pre-reproductive age group
- represents Reproductive age group
- represents Post-reproductive age group
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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.
Construct an age pyramid which reflects a stable growth status of human population.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
List the attributes that populations but not individuals possess.
What is reproductive fitness? Explain it with the help of an example.
Answer the following question.
"The size of a population for any species is not a static parameter." Justify the statement with specific reference to fluctuations in the population density of a region in a given period of time.
Animals that can move from fresh water to sea called as ________.
`"dN"/"dt" = "rN" (("K"- "N")/"K")` in logistic growth "K" represents:
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
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
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Fish
Draw an age pyramid for the ‘zero population growth rate’.
Comment on the following figures: 1, 2 and 3:
A, B, C. D, G, P, Q, R, S are species
The following diagrams are the age pyramids of different populations. Comment on the status of these populations.
Identify the type of pyramid given above. Write the identifying feature on the basis of which you identified it.
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.
