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Earn 100

Which of the following does not decrease the population size?
(a)Predation
(b)Death
(c)Emigration
(d)Immigration

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Important Questions on Balance
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If any population has an equal birth rate and death rate then its age pyramid is X , vital index is Y and the population is Z .

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Which one of the following statements regarding sex composition is not correct?

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The phenomenon of 'demographic dividend' of a country relates to_______________.

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Number of live births per 1000 people per year.

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Give biological explanations for the following:
Education is very important for population control

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Population explosion is the root cause for the depletion of natural resources. Explain.

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Give appropriate biological or technical terms for the following:
The difference between the birth rate and death rate.

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The size of the human population of Earth is affected by many factors. It also causes effects on other factors.
Choose three factors that most affect the size of the human population. Select the best factors.


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