Because it's partially permeable membrane so it won't let anything get inside the leaf so by this cuticle the leaf is protected not to let any foreign substances in and preventing loss of water
Yes! they would be your aunt and uncle!
Water is attracted to ions, such as sodium, potassium, phosphate, and chloride ions. Maintenance of normal intracellular fluid volume depends largely on the intracellular concentration of potassium and phosphate ions. Maintenance of extracellular water volume on the other hand depends primarily on the extracellular concentration of sodium and chloride ions.
