Which gland is concerned with salt equilibrium in the body?

The $H-$ zone in the skeletal muscle fibre is due to:

When the temperature of a black body increases,it is observed that the wavelength corresponding to maximum energy changes from $0.26 \mu m$ to $0.13 \mu m$. The ratio of the emissive powers of the body at the respective temperatures is

An enzyme that can stimulate germination of barley seeds is

If one end of the diameter is $(1, 1)$ and the other end lies on the line $x + y = 3$,then the locus of the centre of the circle is

The maximum number of sub-levels,orbitals and electrons in $N$ shell of an atom are respectively