The standard of living is very badly affected by
Pollution
Housing problem
Population growth rate
$(a)$ and $(b) $ both
If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur
The cause of zero growth of population is
Sigmoid growth curve is represented by
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 ?