How much of the weight of a cell is water

I don't know if this is what you are asking, but water weighs 70% of a cell.

its 42

i say its d?

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.