Desert grasses often roll their leaves due to presence of

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:

When secondary growth is initiated in dicot stem, what will happen first?

Given below are two statements : One is labelled as Assertion $A$ and the other is labelled as Reason $R$:

Assertion $A$ : Late wood has fewer xylary elements with narrow vessels.

Reason $R$ : Cambium is less active in winters.

In the light of the above statements, choose the correct answer from the options given below :

Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of :

$A$ : Bark is all the tissue outside steler cambium.

$R$ : Bark is formed due to the activity of phellogen only.