Answer:
i have 2 answers if they are both wrong im sorry
Explanation:
Small uncharged polar molecules, such as H2O, also can diffuse through membranes, but larger uncharged polar molecules, such as glucose, cannot. Charged molecules, such as ions, are unable to diffuse through a phospholipid bilayer regardless of size; even H+ ions cannot cross a lipid bilayer by free diffusion.
or
The molecules that cannot pass through the phospholipid bilayer are sugars, +ions, and -ions.
