Damage to which structure will most directly disrupt water balance within a single celled organism? ribosome cell membrane nucleus chloroplast

The correct answer will be option-Cell membrane

Explanation:

Cell membrane or plasma membrane is the outermost layer of the cell of the animal kingdom which is composed of the phospholipids.

The phospholipid layer protects the inner environment of the cell from the outer environment as well as it allows the movement of the solute and water through specialised proteins embedded in the layer.

Since, the proteins of the cell membrane like aquaporin allow the passive movement of the water through osmosis therefore, the damage to the cell membrane will affect the water balance of the cell.

Thus, the cell membrane is the correct answer.

i think its both a and b