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In a dicot stem, you would find
Open vascular bundles
Conjoint vascular bundles
Collateral vascular bundles
All of these
Answers (1)
TYPES OF VASCULAR BUNDLES:
Open Vascular Bundles: When the fascicular cambium is present between the xylem and phloem. Present in dicot stems and gymnosperm stems.
Closed Vascular Bundles: When there is no fascicular cambium in between the xylem and phloem. Present in monocot stems.
Radial Vascular Bundles: When xylem and phloem are present on the different radii in the anternate fashion. It is seen in roots. It is the most primitive type of vascular bundles.
Conjoint VASCULAR BUNDLES: When xylem and phloem are present side by side on the same radius.
Conjoint Collateral Vascular Bundles: When xylem and phloem are present on the same radius and phloem is external to the xylem. These can be closed or open.
Conjoint Bicollateral Vascular Bundles: When xylem and phloem are present on the same radius but phloem is present in two patches, that is, both internal and external to the xylem. These are always open. It is the feature of family Cucurbitaceae.
Concentric Vascular Bundles: When one complex tissue completely surrounds the other complex tissue. These are always closed.
Amphivasal or Leptocentric Vascular Bundles: When xylem surrounds the phloem.
Amphicribal Or Hadrocentric Vascular Bundles: When phloem surrounds the xylem.
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The vascular bundles in dicot stem are open (cambium present), conjoint (xylem and phloem on same radius) and collateral (phloem external to xylem).
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