Niche overlap indicates

Consider a circle with its centre lying on the focus of the parabola $y^2 = 2px$ such that it touches the directrix of the parabola. Then a point of intersection of the circle and the parabola is:

In a nuclide,one $a.m.u.$ of mass is dissipated into energy to bind its nucleons. The energy equivalent of this mass is

If an organism is in the same $Class$ but not in the same $Family$, then it may belong to the same:

The radius of the sphere $x^2+y^2+z^2=12x+4y+3z$ is

If $\int(1-\cos x) \operatorname{cosec}^2 x \, dx = f(x) + c$,then $f(x)$ is equal to