NEET 2011 Biology question

Some vascular bundles are described as open because these

(1)are surrounded by pericycle but to endodermis
(2)are capable of producing secondary xylem and phloemCorrect
(3)possess conjunctive tissue between xylem and phloem
(4)are not surrounded by pericycle

Answer: (2)

Solution

In dicot stems the vascular bundles are open: a strip of meristematic cambium lies between the xylem and phloem. Because of this cambium, such bundles can form secondary xylem (towards inside) and secondary phloem (towards outside), allowing

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Question ID VK-090707