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Question

The active cells of vascular cambium divide to form two type of cells. Out of which one acts as cambial cell which divide repeatedly, while other (secondary cell) differentiate into

A
Secondary phloem centripetally and secondary xylem centrifugally
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B
Secondary phloem and secondary xylem towards inner side
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C
Secondary xylem centripetally and secondary phloem centrifugally
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D
Secondary phloem and secondary xylem towards outer side
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Solution

The correct option is A Secondary phloem centripetally and secondary xylem centrifugally
Vascular cambium is also known as lateral meristem. Vascular cambium is formed in a ring-like structure by joining of fascicular and interfascicular cambium. It is made up of fusiform initials and ray initials. The active cell of vascular cambium divide by the periclinal division to form two types of cells. Out of the two, one acts as the cambial cell, which divides repeatedly, while others differentiate into secondary phloem centripetally and secondary xylem centrifugally. The cells of pericycle lying toward the outer side of protoxylem divide by tangential division.
Thus, the correct answer is option A.

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