During its life cycle,$Fasciola$ $hepatica$ (liver fluke) infects its intermediate host and primary host at the following larval stages,respectively:

Growing crop plants in monoculture leads to ........

The value of $\cot 70^{\circ} + 4\cos 70^{\circ}$ is

In $\Delta ABC$,the expression $a(\cos^2 B + \cos^2 C) + \cos A(c \cos C + b \cos B)$ is equal to:

Water is considered to be polluted if the dissolved oxygen $(D.O.)$ content is less than ... $ppm$ :

$A$ bucket filled with water is tied to a rope of length $0.5 ~m$ and is rotated in a circular path in a vertical plane. The minimum velocity it should have at the lowest point of the circle so that the water does not spill is,$(g = 10 ~m/s^2)$.