In the equation $\log S = \log C + Z \log A$,what does '$C$' represent?

Select the correct statement $:-$

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

Which of the following fluorides does not exist?

An electric dipole of length $4 \ cm$ is placed with its axis making an angle of $30^{\circ}$ to a uniform electric field of $10^6 \ N/C$. If it experiences a torque of $20 \sqrt{3} \ Nm$,then the potential energy of the dipole is: (in $J$)

Which cell organelle can be identified by Sudan Black?