Secondary Growth in Cork Cambium

Q. Lenticels help in

1. protection of the plant
2. checking evaporation of water
3. facilitating gaseous exchange
4. secondary growth of the plant

Q. Match the following columns and choose the $\text{correct}$ option.
$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ \text{A.}& \text{Cork}& \text{(i)}& \text{Phellogen}\\ \text{B.}& \text{Extra stellar cambium}& \text{(ii)}& \text{Phellem}\\ \text{C.}& \text{All tissues outside the vascular cambium}& \text{(iii)}& \text{Phelloderm}\\ \text{D.}& \text{Secondary cortex}& \text{(iv)}& \text{Bark}\end{array}$

$\begin{array}{ccccc}& \text{A}& \text{B}& \text{C}& \text{D}\\ \text{(1)}& \text{(ii)}& \text{(iv)}& \text{(iii)}& \text{(i)}\\ \text{(2)}& \text{(ii)}& \text{(i)}& \text{(iv)}& \text{(iii)}\\ \text{(3)}& \text{(iii)}& \text{(iv)}& \text{(i)}& \text{(ii)}\\ \text{(4)}& \text{(iii)}& \text{(ii)}& \text{(iv)}& \text{(i)}\end{array}$

1. $\left(2\right)$
2. $\left(1\right)$
3. $\left(4\right)$
4. $\left(3\right)$

Q. Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.

Q. Which of the following statements are not correct?
I. Cork cambium is otherwise called phellogen.
II. Cork is otherwise called phellem.
III. Secondary cortex is otherwise called periderm.
IV. Cork cambium, cork and secondary cortex are collectively called phelloderm.
Select the correct answer using the codes given below:

1. III and IV
2. I and II
3. II and III
4. II and IV
5. I and IV

Q. Main function of lenticel is:

1. Transpiration
2. Guttation
3. Gaseous exchange
4. Bleeding