The bio-index number means
Natality -Mortality
Natality $×$ Mortality
Mortality -Natality
Natality/Mortality
In India, marriageable age for boys is ______ and girls is ______ respectively.
According to the World Health Organisation $(WHO)$, reproductive health means a total well-being in all aspects of reproduction, i.e., physical, emotional, behavioural and social. The headquarters of $WHO$ are located in
In India the number of females per thousands males had been constantly decreasing but in which of the following years, the number had been increased
Closely related, morphologically similar sympatric populations, but reproductively isolated, are designated as