In a plant organ which is convered by periderm and in which the stomata are absent, some gaseous exchange still takes place through

Options

A. Aerenchyma
B. Trichomes
C. Pneumatophores
D. Lenticels.

Answer

D

Explanation

Due to continued formation of secondary tissue in the older stem and roots however the epidermins gets stressed and ultimately tends to rupture and followed by death of epidermal cells and outer tissues,and a new protective layer is developed called periderm.structuarally it consists of three parts phellogen or cork cambium phellem or cock and phelloderm.Usually in the periderm of most plants,certain areas with loosely arranged cells have been found,which posses more or less break through the epidermis.Such areas are universally found in the stems of woody plants these broken areas are called lenticels,which perform the fuction of exchange of gases in the absence of stomata.