Distinct annual rings are formed in plants growing in:

Complementary cells are formed by the activity of ..........

Vascular cambium is a meristematic layer that cuts off

Scaly bark is found in ...........

$A$ timber merchant told his customer that the wood log he was buying was from a $20$-year-old tree. How did he suggest this?

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: