The most important property of the cell membrane<span> is its selective permeability: </span>some substances<span> can </span>pass through<span> it freely, but others cannot. Small and nonpolar (hydrophobic) molecules can freely </span>pass through<span> the </span>membrane<span>, but charged ions and large molecules such as proteins and sugars are barred passage. </span>
The answer is B. The cytoplasm hold everything in place and provides structure to the cell. It keeps the organelles inside. Hope this helps!
Populations belong to the same species if they can contribute genes to a common gene pool
Moving a car and flying an airplane
