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.
Thin layer of decaying organic matter is found. Years of weathering washed most of the nutrients away.
cardiac, smooth, and skeletal
Hope this helps!
-Payshence xoxo
