What is true of diffusion?

Diffusion is only important for animal cells.

Diffusion requires energy input from the cell.

Only water can diffuse across a cell membrane.

Molecules move from areas of high concentration to areas of low concentration.

Question

What is true of diffusion?
		
Diffusion is only important for animal cells.
		
Diffusion requires energy input from the cell.
		
Only water can diffuse across a cell membrane.
		
Molecules move from areas of high concentration to areas of low concentration.

chpatterson · Answer

If concentration A is > concretion B, then concentration A will move toward concentration B, because B < A, and there is more room in B for molecules. 

Molecules will move along this gradient to spread out more equally.

chpatterson · Answer

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwihhYmWqt7QAhWI4SYKHZeLDvYQFggpMAI&url=http%3A%2F%2Fbrainly.com%2Fquestion%2F271961&usg=AFQjCNF0gEeFjfbsw2gBAmPpLrnTVOwZlA

okdutchman7 · Answer

what do you think?