The cuticle, a thin, protective film covering plants non-equip with a periderm, composed by an insoluble cuticular membrane, a structure whose prim component is Cutin, a polyester polymer, meaning a substance which is constituted by different polymers possessing ester, a compound with adjacently linked carbonyls(double bonded carbon and oxygen)and ethyls(substances with an oxygen bonded either to two alkyl or aryl groups),interposed over by soluble wax, is an adaptation developed by plants experiencing the transition from water encased dwellers to terrestrial occupiers over 450 million years ago to regulate water loss. Cutan, a hydrocarbon polymer, can also play a significant role in constituting the cuticle. The waxy layer encasing the above leaf is the outer layer of the cuticle.


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