One of the reasons the plasma membrane can have<span> selective permeability</span><span> it's because it's composed by a bi-layer of phospholipids.
The interaction between them and other molecules will influence how these molecules will cross the membrane. If the molecule it's </span>hydrophobic it can easily cross, if it's polar molecules and ions( hydrophilic), they cannot cross easily.
Yes it does because how it looks
Answer:
Probably because they just need air to being able to live and have air going in and out like carbon dioxide and getting rid of used air.
Chromalveolates is the answer i think
