FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Primary meristem in origin
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Secondary meristem in origin
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Promeristem in origin
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Both primary and secondary meristem in origin
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Detailed explanation-1: -The vascular cambium in dicot stem is partly primary and partly secondary in origin. The intrafascicular cambium present inside the vascular bundle in the dicot stem is primary in origin while the interfascicular cambium formed from the cells of medullary rays is secondary in origin.
Detailed explanation-2: -Complete answer: In the very beginning, the fascicular cambium is a primary meristem, later it gets transformed into a secondary meristem, during the secondary growth. Since this cambium lies between two vascular bundles it is called interfascicular cambium.
Detailed explanation-3: -In the dicot root, the vascualr cambium is completely secondary in origin . vascular cambium originates from the tissue located just below the phloem bundles, a portion of pericycle tissue above the protoxylem forming a complete and continuous wavy ring, which later becomes circular.