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.
Continental polar air mass this is the type of mass that come from northern Canada
Answer:
evolutionary theory of sexual behavior.
Explanation:
This answer could be cellular respiration. It makes energy so they can live (in basic terms) haha