Why are ions and polar molecules unable to pass easily though the lipid bilayer?

Because they have to go through the non-polar, hydrophobic tales of the phospholipid bilayer. Polar and non-polar do not like to be together 

The correct answer is d

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask