The five-kingdom classification system was proposed by whom?

$A$ tank is filled up to a height $h$ with a liquid and is placed on a platform of height $h$ from the ground. To get the maximum range $x_m$,a small hole is punched at a distance of $y$ from the free surface of the liquid. Then:

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is:

Which of the following is a medicinal plant?

The focal length of an equi-convex lens is greater than the radius of curvature of any of the surfaces. Then the refractive index of the material of the lens is

Identify the chiral molecule from the following.