A vascular bundle in which phloem is on both the sides of the xylem and separated from it by strips of cambium is said to be
A
Collateral open
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B
Bi-collateral open
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C
Concentric
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D
Bi-collateral closed
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Solution
The correct option is B Bi-collateral open Bicollateral vascular bundles contain two patches of phloem on either side of the xylem on the same radius. The outer phloem or external phloem remains towards the periphery of the central cylinder and inner or internal phloem remains towards the center. If cambium is present in between xylem and phloem, it is called as bicollateral open.