Girth of a dicot stem is increased by

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(B) The increase in the girth or diameter of a dicot stem is known as secondary growth.This process is primarily mediated by the activity of the later

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Cambium

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(B) The increase in the girth or diameter of a dicot stem is known as secondary growth.This process is primarily mediated by the activity of the lateral meristems,specifically the vascular cambium.The vascular cambium produces secondary xylem towards the inner side and secondary phloem towards the outer side,which leads to an increase in the thickness of the stem.

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