Which genotype represents a true dihybrid condition?

The charge on colloidal particles is due to

$A$ small metal sphere of radius $a$ is falling with a velocity $v$ through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is $\eta$,then the sphere encounters an opposing force of

The Biuret test is not given by:

The electrochemical equivalent of a metal is $x \ g \ C^{-1}$. The equivalent weight of the metal is:

In $Pteridophytes$,reduction division occurs when -