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

How many mitotic divisions are needed for a single cell to make $128$ cells?

If tangents are drawn from any point on the circle $x^2+y^2=25$ to the ellipse $\frac{x^2}{16}+\frac{y^2}{9}=1$,then the angle between the tangents is

Which of the following compounds on oxidation gives methyl ethyl ketone?

The coefficient of $x$ in the equation $x^2 + px + q = 0$ was taken as $17$ in place of $13$. Its roots were found to be $-2$ and $-15$. The roots of the original equation are:

What are the algal components of a lichen called?