Question

Procambium forms
A. Only primary vascular bundles
B. Only vascular cambium
C. Only cork cambium
D. Primary vascular bundles and vascular cambium

Answer 1

Hint:- Procambium is a meristematic tissue which provides the primary tissues in the vascular system and is also responsible for production of new vascular systems in mature stems and roots.

Complete step-by-step solution:- Procambium is a meristematic tissue which provides the primary tissues in the vascular system andis also responsible for production of new vascular systems in mature stems and roots.Solution: The meristematic tissues of the plant can be classified into three types:-

1. Protoderm, which forms epidermal tissues in plants.
2. Procambium, which form the vascular tissues in plants.
3. Ground meristem which form the ground tissues.
   As we already mentioned, Procambium is a meristematic tissue which provides the primary tissues in
   the vascular system and is also responsible for production of new vascular systems in mature stems and
   roots.The procambium is located next to the protoderm. More specifically, it is located in the center of
   vascular bundles, the xylem and the phloem. The meristematic or continuously dividing cells are
   cylindrical in shape, they form the primary xylem and primary phloem in mature stems and roots or wecan say the meristematic cells divide to form new cells that make up the primary xylem and the primary phloem. The vascular cambium and the cork cambium may also arise from the procambium.
   So, we have asked about what does procambium forms and the options are: Only primary vascular bundles, only vascular cambium, only cork cambium, and Primary vascular bundles and vascular
   cambium. So, as we know, they form the primary xylem and primary phloem in mature stems and roots.
   Xylem and phloem are vascular tissue so we can say that procambium forms only primary vascular bundles and the vascular cambium and the cork cambium may also arise from the procambium. So the correct option is D. Primary vascular bundles and vascular cambium.

Note:-
The main function of procambium is production of primary vascular bundles in plants but they also form primary vascular cambium. So, the answer is both vascular bundle and vascular cambium not only vascular bundle.