Explain the process by which cork is formed in trees. Along with the d

1.	Explain the process by which cork is formed in trees. Along with the diagram
Answer» \tThe first cork cambium is formed by the dedifferentiation of the outer part of the cortex.\tAs the stem increases in girth, the epidermis and the cortex are replaced by another meristematic tissue called the cork cambium.\tIt is also called phellogen.\tThe cells of the phellogen are thin-walled, rectangular and narrow.\tThe cork cambium is 2–3 layers thick.\tCells of the cork cambium cuts off cells peripherally and towards the centre.\tCells on the peripheral region form the cork cambium or phellem.\tThe walls of cork cells have depositions of suberin because of which cork becomes impermeable to water.\tCells on the inner region form the secondary cortex or phelloderm. The cells of this region are parenchymatous.

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