I have been trying to find the awnser to these questions for 2 hours. I can't find anything so any smart Biology reader here? Please help! I will personally thank you for your help and smartness that I will never have! OMG SJFKD;LJF SOMEONE HELP. 

First Question:

Write a new question about cell size and diffusion that can be explored in another investigation?

Second Question:

How does cells transport in prokartotic cells differ from cell transport in eukaryotic cells?

Third Question: Which of the following diffuse across the membrane without the help of a transport protien?

Water

Lipid

Protien 

Carbs?

I will love you till death if anybody knows atleast the awnser to 1 question.