B. Semi fluid substance called the cytosol
By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
The essence of Greek drama is the deeply felt belief that mortals can not escape pain and sorrow. And this belief is usually reflected in their dramas which are usually centered around murder, r.ape, incest, suicide and mutilation.
There is not that much information, so it is impossible to answer this question. I apologise.
A and B i think am not sure