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  4. Some vascular bundles are described as open because these

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Q. Some vascular bundles are described as open because these

AIPMTAIPMT 2011Anatomy of Flowering Plants

Solution:

In dicot stem, cambium is present between xylem and phloem, such vascular bundles are called open. In monocot stem, the cambium is absent, such vascular bundles are called closed. Cambium are the meristematic cells which produces secondary xylem and phloem.