Membranes
Membranes control what enters and leaves a cell. Therefore membranes are said to be a selective barrier.
Hardin et al. (2011) "Beckers World of the Cell" 8th ed., Pearson Education, pp. 27
Membranes control what enters and leaves a cell. Therefore membranes are said to be a selective barrier.
Hardin et al. (2011) "Beckers World of the Cell" 8th ed., Pearson Education, pp. 27