The cork cambium (phellogen) is formed from:

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(A) The cork cambium,also known as $phellogen$,is a secondary meristematic tissue.It is formed by the dedifferentiation of the cortical cells (parench

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Phellogen

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(A) The cork cambium,also known as $phellogen$,is a secondary meristematic tissue.It is formed by the dedifferentiation of the cortical cells (parenchyma cells) located just below the epidermis during secondary growth in dicot stems and roots.Therefore,the correct origin of the cork cambium is the cortical cells (part of the ground tissue system).Among the given options,$Phellogen$ is the tissue itself,but the question asks for the origin. However,in the context of standard multiple-choice questions where the options are limited,$Phellogen$ is often cited as the layer involved in the periderm formation. Given the options provided,$A$ is the most appropriate choice as it refers to the tissue layer responsible for cork production.

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