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Biology · 2024 · 4 marks
CBSE 2024 · Region 3 · Set 1 · Q30
Study the figures given below that depict the comparative age distribution of human populations in Sweden and Rwanda. (International Data Base 2003)…
Study the figures given below that depict the comparative age distribution of human populations in Sweden and Rwanda. (International Data Base $\displaystyle 2003$) and answer the questions that follow :
(a)
What can be inferred from the very broad base of Rwanda's age pyramid ? Support your answer with the data provided in the figure.
(b)
Sweden has an age distribution that is approximately of the same width near its base as at the apex. What does this indicate ?
(c)
Name the type of age pyramid shown above for Sweden.
OR
(c)
Name the type of age pyramid shown above for Rwanda.
Marking-scheme solution
(a)
Rwanda – very broad base of Rwanda’s age distribution indicates a rapidly growing
population/ population explosion/ Increasing population/ expanding population.
Because large number of individuals are in pre-reproduction age group.
(b)
It indicates that number of individuals in pre-reproductive and post-reproductive age
groups are same.
(c)
Declining age pyramid.
OR
(c)
Expanding age pyramid
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