In old trees, the greater part of secondary xylem is dark brown due to the

Identify the correct statements:

$A$. Lenticels are the lens-shaped openings permitting the exchange of gases.

$B$. Bark formed early in the season is called hard bark.

$C$. Bark is a technical term that refers to all tissues exterior to vascular cambium.

$D$. Bark refers to periderm and secondary phloem.

$E$. Phellogen is single-layered in thickness.

Choose the correct answer from the options given below:

In a stem which is covered by periderm and in which stomata are absent, gaseous exchange takes place through

Food material stored in xylam parenchyma in the form of................

Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem

Wood is a common name of