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Question
After two or three years of secondary growth, the cortex in dicot roots
After two or three years of secondary growth, the cortex in dicot roots
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Solution
The correct option is B Is completely sloughed away
Vascular cambial activity produces secondary tissues that push and rupture epiblema and outer cortex. Pericycle resumes the meristematic activity and divides to form cork cambium /phellogen. The cork cambium exhibits meristematic activity and produces cork /phellem towards the periphery and phelloderm on inside i.e., extra stellar growth. These secondary tissues cause pressure and rupture the cells layers present outside the pericycle (endodermis and cortex). This results in complete loss of primary cortex. As mentioned, cork is a secondary tissue and is produced by cork cambium. Therefore, the correct answer is option B.
Vascular cambial activity produces secondary tissues that push and rupture epiblema and outer cortex. Pericycle resumes the meristematic activity and divides to form cork cambium /phellogen. The cork cambium exhibits meristematic activity and produces cork /phellem towards the periphery and phelloderm on inside i.e., extra stellar growth. These secondary tissues cause pressure and rupture the cells layers present outside the pericycle (endodermis and cortex). This results in complete loss of primary cortex. As mentioned, cork is a secondary tissue and is produced by cork cambium.
Therefore, the correct answer is option B.
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