The T.S. of the stem of Cucurbita can be iden | vedclass

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(A) In the $T.S.$ of the stem of $Cucurbita$ (family $Cucurbitaceae$),the vascular bundles are bicollateral.Bicollateral vascular bundles are characte

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Bicollateral vascular bundles

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(A) In the $T.S.$ of the stem of $Cucurbita$ (family $Cucurbitaceae$),the vascular bundles are bicollateral.Bicollateral vascular bundles are characterized by the presence of phloem on both the outer and inner sides of the xylem.In contrast,the sunflower stem $(Helianthus)$ possesses conjoint,collateral,and open vascular bundles,where phloem is present only on the outer side of the xylem.Therefore,the presence of bicollateral vascular bundles is the diagnostic feature used to distinguish $Cucurbita$ stem from sunflower stem.

The $T.S.$ of the stem of $Cucurbita$ can be identified from the $T.S.$ of a sunflower stem by the presence of:

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