The standard of living is very badly affected by
Pollution
Housing problem
Population growth rate
$(a)$ and $(b) $ both
It's Obvious
Below diagram indicates
Natality refers to.
A biologist studied the population of rats in a barn. He found that the average natality was $250$, average mortality $240$, immigration $20$ and emigration $30$. The net increase in population is
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
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