It would be Polar Easterlies, Prevailing Westerlies, and the Trade Winds. (Tropical Easterlies)
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.
An potato plant that is modified to resist pests because if you can modify the dna of a potato to resist pest, you could open up a whole new world of farming
