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Question
Assertion :In the dicot root, the vascular cambium is secondary in origin. Reason: Secondary growth occurs in stems and roots of gymnosperms also.
Assertion :In the dicot root, the vascular cambium is secondary in origin. Reason: Secondary growth occurs in stems and roots of gymnosperms also.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In dicot root, the vascular cambium is completely secondary in origin, and it originates from a portion of pericycle tissue. The pericycle regulates the formation of lateral roots by rapidly dividing near the xylem elements of the root. It has been known to often be confused with other parts of the plant. Gymnosperms are seed-bearing vascular plants in which the ovules or seeds are not enclosed in an ovary. Secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken. So the correct option is 'both assertion and reason are correct and the reason is correct explanation for assertion'.
In dicot root, the vascular cambium is completely secondary in origin, and it originates from a portion of pericycle tissue. The pericycle regulates the formation of lateral roots by rapidly dividing near the xylem elements of the root. It has been known to often be confused with other parts of the plant. Gymnosperms are seed-bearing vascular plants in which the ovules or seeds are not enclosed in an ovary. Secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken.
So the correct option is 'both assertion and reason are correct and the reason is correct explanation for assertion'.
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