Average population density on earth is
$6$ persons/sq. km
$26$ persons/sq. km
$10$ persons/sq. km
$40$ persons/sq. km
It's Obvious
“In the absence of environmental resistance the population grows in geometrical ratio when the food is given in arithmetical ratio''. This is
Which of the following is hormone releasing $IUD$?
‘Essay on population’ was published by
In which one of the following the birth rate is high & death rate is normal
Which of the following $STDs$ is not caused by a bacterium?
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