The sclerenchyma of the hypodermis in the Pinus needle helps in
Increasing the absorptive surface of the cell
Checking transpiration
Mechanical support
Photosynthesis
In a stem which is covered by periderm and in which stomata are absent, gaseous exchange takes place through
Growth rings $(annual\ rings)$ are formed by activity of
What is periderm? How does periderm formation take place in dicot stem?
Growth rings are absent or not sharply demarcated in the trees of
Periderm is made up of