Cork is a derivative of

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(A) Cork,also known as phellem,is produced by the activity of the cork cambium,which is technically called the phellogen.The phellogen is a secondary

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Cork cambium (phellogen) or extra-stelar cambium

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(A) Cork,also known as phellem,is produced by the activity of the cork cambium,which is technically called the phellogen.The phellogen is a secondary meristem that develops in the cortex region of the stem during secondary growth.It cuts off cells on both sides: the cells cut off towards the outside differentiate into cork (phellem),while the cells cut off towards the inside differentiate into secondary cortex (phelloderm).Together,phellogen,phellem,and phelloderm are collectively known as periderm.

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