Question

The leaf stalks and stem of a plant 'X' are not flexible and break easily in a wind storm. Which tissue is lacking in this plant? 

a) Chlorenchyma
b) Sclerenchyma
c) Collenchyma
d) Parenchyma

The function of epidermis is *

a) Provides protection to the plant against loss of water.
b) Protects the plant from invasion by parasitic fungi.
c) Protects the plant from mechanical injury.
d) All the above.


Which of the following statements is incorrect about the Collenchyma tissue? *

a) The cells of the tissue are living.
b) The cells have irregularly thickened cell walls at the corners.
c) The cells have large intercellular spaces between them.
d) This tissue is located in leaf stalks below the epidermis.​

Answer 1

Answer:

1. (b) Sclerenchyma

2. (d) All of the above

3. (d) This tissue is located in leaf stalks below the epidermis.

Answer 2

$\textbf{Answer:}$

1.The leaf stalks and stem of a plant 'X' are not flexible and break easily in a wind storm. Which tissue is lacking in this plant? 

Ans:$\textbf{(c)Collenchyma}$

Collenchyma is responsible for the flexibility in plants. Collenchyma are mainly present in the structures which have to withstand external pressure.

Hence, the leaf stalks and stem of Plant 'X' are lacking collenchyma.

2.The function of epidermis is

Ans:$\textbf{(d)All the above}$

Epidermis is present on the outer layer of cells. It checks loss of water, provides protection against mechanical injury as well as parasitic fungi.

The epidermis of the desert plant has a thick layer of cutin that is called cuticle which is responsible for the above mentioned functions in them.

3.Which of the following statements is incorrect about the Collenchyma tissue?

Ans:$\textbf{(c)The cells have large intercellular spaces between them}$

Incorrect, In collenchyma cells less space is present between the cells.Collenchyma consists of elongated cells with irregular thickenings.