In a specific area, the negros, aryans, smartians and mongolians are living. They constitute
A group
Monospecific population
Polyspecific population
Heterogenous population
It's Obvious
Housing problems, health problems, pollution problems etc. are created by the
Secondary infertility is
Family planning program was initiated in
$NMEP$ stands for
The natural growth rate of population is checked by certain factors. These are known as
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