The grafting method can be used in which of the following?

Which of the following is responsible for the growth in circumference or girth of stem and root in plants?

Lenticels are involved in:

The vascular cambium normally gives rise to

The functional xylem of a dicot tree is:

Read the different components from $(i)$ to $(iv)$ in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem.
$(i)$ Secondary cortex $(ii)$ Wood $(iii)$ Secondary phloem $(iv)$ Phellem
The correct order is: