Which of the following forms more than $\frac{1}{2}$ of a cell?

In nature,organic compounds invariably contain

Which element is not typically present in organic compounds?

The size of solute particles in a true solution is:

Which is the most appropriate option for organic compounds?

When a living tissue is ground in trichloroacetic acid to form a slurry and filtered through cheesecloth or cotton,the $.....$ passes through the cheesecloth or cotton.