In old trees, the greater part of secondary xylem is dark brown due to the
Deposition of inorganic material
Deposition of organic material
Activity of cambium
Activity of secondary xylem
Aerating pores are present at places on the cork cambium. These are called
Intrafascicular cambium is present in between the
$I.$ Protection of internal tissues
$II.$ Protection of leaves from microbes
$III.$ Gaseous exchange
$IV.$ Reduction in the rate of transpiration through epidermal cells due to trichomes
Which of the function of epidermis is/are relevant from the above given statements?
The sclerenchyma of the hypodermis in the Pinus needle helps in
$A$ : Bark is all the tissue outside steler cambium.
$R$ : Bark is formed due to the activity of phellogen only.