For approximately how many days does menstruation last in human females?

Organisms have a varied body design. Name the property which gives the basic difference in body design.

Write true or false for the statement: If the egg is not fertilized,it lives for about one day.

Which among the following is not the function of testes at puberty?
$(i)$ formation of germ cells
$(ii)$ secretion of testosterone
$(iii)$ development of placenta
$(iv)$ secretion of estrogen

At what age do girls typically reach puberty (in $years$)?

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1$. Condom	$a$. Female contraceptive device
$2$. Copper-$T$	$b$. Sex determination
$3$. Tubectomy	$c$. Male contraceptive device
$4$. Sonography	$d$. Female surgical procedure for population control