Vascular bundle in the laves of dicots are surrounded by 1) Epidermis 2) Bundle sheath cells 3) Pericycle 4) Both (1) and (3)

Question ID - 100261 :- Vascular bundle in the laves of dicots are surrounded by 1) Epidermis 2) Bundle sheath cells 3) Pericycle 4) Both (1) and (3)

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Vascular system includes vascular bundles, which can be seen in the veins and the midrib. The size of the vascular bundles are dependent on the size of the veins. The veins vary in thickness in the reticulate venation of the dicot leaves. The vascular bundles are surrounded by a layer of thick walled bundle sheath cells

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The spool shown in the figure is placed on a rough horizontal surface and has inner radius  and outer radius . The angle  between the applied force and the horizontal can be varied. The critical angle (  for which the spool does not roll and remains stationary is given by

 a) b) c) d)