List two functions of the ovary in the human female reproductive system.

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

Which among the following statements are true for unisexual flowers?
$(i)$ They possess both stamen and pistil
$(ii)$ They possess either stamen or pistil
$(iii)$ They exhibit cross pollination
$(iv)$ Unisexual flowers possessing only stamens cannot produce fruits

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

Explain the process of regeneration in $Planaria$. How is this process different from reproduction?

Define reproduction. How does it help in providing stability to the population of species?