The answer is all of the above
The last option: over tens of millions of years, the giant supercontinent Pangaea began to slowly drift apart forming the continents
Answer: A Physical Barrier. ...
Selective Permeability. ...
Endocytosis and Exocytosis. ...
Cell Signaling. ...
Phospholipids. ...
Proteins. ...
Carbohydrates. ...
Fluid Mosaic Model.
Explanation: Have a good rest of the day.