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Anatomy Of Flowering Plants

Question
CBSEENBI11002285
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Vascular bundles in monocotyledons are considered closed because

  • a bundle sheath surrounds each bundle

  • cambium is absent

  • there are no vessels with perforations

  • xylem is surrounded all around by phloem

Solution

B.

cambium is absent

The vascular bundles of monocots do not contain a layer of meristematic tissue (cambium). There is absence of meristematic tissue near vascular bundles, therefore vascular system is closed in monocot. Hence, the further secondary growth is not seen in them. 
So, option (b) goes with question. 

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