The molecules doesn't need energy to cross through.
The diffusion doesn't need protien, the molecules pass between phospholipids by passes protien. It moves smaller molecules. Facilitated need protien also hormone, and larger molecules.
I wish it makes sense.
I disagree because although recycling is good, Earth firstly is not a closed system and new matter enters the environment all the time, such as comets.
B)LIVER has eukaryotic animal cells