Presently, the world population doubles after every
$15$ years
$20$ years
$30$ years
$33$ years
Which of the following $STDs$ is not caused by a bacterium?
The aggregate of process that determine the size and composition of any population is called
Action of which of the following hormones is blocked during use of $RU\; 486$ (mifepristone)?
Castration cannot be taken as a contraceptive device, because
Which of the following cannot protect the user from contracting $AIDS$?