Which of the following sexually transmitted diseases is caused by a virus?

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

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

Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure $D$ and $E$ by indicating the regenerated regions.

Differentiate between plumule and radicle.

List four points of significance of reproductive health in a society. Name any two areas related to reproductive health which have improved over the past $50$ years in our country.