Secondary growth is observed due to the activity of ..........

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:

The function of cork cambium $(phellogen)$ is to produce

The trees growing in the desert will:

Complementary cells are associated with

The common bottle cork is a product of