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Question

Other names of cork, cork cambium and secondary cortex are


A
Phellem, phellogen and phelloderm
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B
Phellogen, phellem and phelloderm
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C
Pelloderm, phellem and phellogen
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D
Phelloderm, phellogen and phellem
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Solution

The correct option is A Phellem, phellogen and phelloderm

The multilayered structure formed by extrastelar secondary growth in dicot stem is called Periderm. it is formed in the place of cortex. it is formed by the activity of a ring of meristamatic tissue formed by the dedifferentiation of parenchyma present in the cortex. It is called cork cambium or phellogen. It undergoes periclinal divisions, produces cells towards the outer side and innerside. The cells towards the outerside form into cork or phellem and the cells towards the innerside form into secondary cortex or phelloderm. Cork, cork cambium and secondary cortex together called Periderm.

So, the correct option is 'Phellem, Phellogen, and phelloderm.


Biology

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