Question

Vascularisation in plants occur through
A. Differentiation of procambium followed by primary phloem and then primary xylem.
B. Differentiation of procambium followed by development of xylem and phloem.
C. Simultaneous differentiation of procambium, xylem and phloem
D. Differentiation of procambium is immediately followed by development of secondary xylem and secondary phloem.

Answer 1

Hint: Vascularisation is a process occurring in plants. In this process vascular tissues of Xylem and Phloem are formed.

Complete Answer:
- The tissue of the vascular tissues that are Xylem and Phloem are formed by the meristematic tissues.
- Meristematic tissues contain the cells that never lose their ability to divide. The meristem that gives rise to the Xylem and Phloem is called the cambium.
- The meristem may be classified as primary meristem and secondary meristem.
- The primary meristem is responsible for the primary growth of the plant.
- Secondary meristem is responsible for the increasing thickness or girth of the plant.
- The meristem that develops into primary vascular tissues that are primary xylem and primary phloem is called procambium. Later procambium gave rise to the vascular cambium and the cork cambium.
- Vascular cambium gives rise to the secondary vascular tissue i.e. secondary xylem and secondary phloem. Cork cambium is responsible for the formation of bark of a plant.

Hence, option B is the correct option for this question.

Note: Xylem is a vascular tissue in plants which is responsible for the transportation of water and minerals from the roots to the other parts of a plant. Phloem is a vascular tissue which is responsible for the transportation of food to the different parts of the plants.