question_answer

A bicollateral vascular bundle has the following arrangement of tissues:

A)  outer phloem \[\to \] outer xylem \[\to \] middle cambium \[\to \] inner xylem \[\to \] inner phloem

B)  outer cambium \[\to \] outer phloem \[\to \] middle xylem \[\to \] inner phloem \[\to \] inner cambium

C)  outer phloem \[\to \] outer cambium \[\to \] Huddle xylem \[\to \] inner cambium \[\to \] inner phloem

D)  outer xylem \[\to \] outer cambium \[\to \] middle phloem\[\to \] inner cambium \[\to \] inner xylem

Correct Answer: C

Solution :

Vascular bundles are of three types i.e., Radial (Phloem and xylem are present on different radius) Concentric (either xylem surrounds the phloem or phloem surrounds the xylem) and Conjoint (xylem and phloem are present on the same radius). Conjoint vascular bundles are further of the two types i.e.. Collateral and Bicollateral. In bicollateral vascular bundles there are two patches of phloem one on each side of xylem. In such vascular bundles, there are two strips of cambium one on each side of xylem, thus the arrangement is