Question

Fill in the blanks

i. The process involved in the absorption of minerals by plant roots is called......
ii. Stomata are more abundant on the .....
Surface of the leaf.
i. Water and minerals flow from one .....
to another through pits.
2. Name the following:

i. Small openings in the old stems and twigs...
ii. The pressure which develops in roots due to the continuous Intlow of water.....
iii. The condition caused in plants due to the deficiency of iron,

3. Give one function of the following:
Sieve Tubes cuticle

4. Answer the following questions:
i. What would happen if the rate of transpiration is more than the water absorbed by the roots?
ii. How does the cell wall of root hair differ from its cell membrane in permeability?​

Answer 1

$\bold{\tt\purple{ANSWER: }}$

$\underline{\rule{200}2}$

FILL IN THE BLANKS :-

1) Ascent of sap

The process of absorption of water by roots by xylem in upward direction is called Ascent of sap.

2) Lower

Stomata are mostly present in lower surface of the leaves

3) Tracheid

Water and minerals flow from one tracheid to another through pits.

$\underline{\rule{200}2}$

NAME THE FOLLOWINGS :-

1. Lenticles

Small openings in the old stems and twigs is called lenticles

2. Root pressure

The pressure which develops in roots due to the continuous in flow of water is called root pressure.

3. Iron chlorosis

The deficiency of iron in plants causes Iron chlorosis.

$\underline{\rule{200}2}$

GIVE ONE FUNCTION OF THE FOLLOWING :-

1. Seive tubes :- The main function of sieve tubes is to transport sugars and nutrients up and down the plant.

2. Cuticle :- Cuticle protective layer covering the epidermal cells of leaves and other parts and limiting water loss.

$\underline{\rule{200}2}$

4. ANSWER THE FOLLWING QUESTIONS :-

i) When transpiration exceeds water absorption by the roots, the plant dehydrates ( due to less water ). As the soil dries out this rehydration is not complete, resulting in the plant becoming water stressed.

$\underline{\rule{200}1}$

ii) The cell wall is completely permeable and allows both water and salt. The cell membrane of the root is selectively permeable membrane which allows only selective things to pass through it.

$\underline{\rule{200}2}$

$\bold{\tt\pink{THANKS}}$

Answer 2

$\bold{\tt\purple{ANSWER: }}$

FILL IN THE BLANKS :-

1) Ascent of sap

The process of absorption of water by roots by xylem in upward direction is called Ascent of sap.

2) Lower

Stomata are mostly present in lower surface of the leaves

3) Tracheid

Water and minerals flow from one tracheid to another through pits.

NAME THE FOLLOWINGS :-

1. Lenticles

Small openings in the old stems and twigs is called lenticles

2. Root pressure

The pressure which develops in roots due to the continuous in flow of water is called root pressure.

3. Iron chlorosis

The deficiency of iron in plants causes Iron chlorosis.

GIVE ONE FUNCTION OF THE FOLLOWING :-

1. Seive tubes :- The main function of sieve tubes is to transport sugars and nutrients up and down the plant.

2. Cuticle :- Cuticle protective layer covering the epidermal cells of leaves and other parts and limiting water loss.

4. ANSWER THE FOLLWING QUESTIONS :-

i) When transpiration exceeds water absorption by the roots, the plant dehydrates ( due to less water ). As the soil dries out this rehydration is not complete, resulting in the plant becoming water stressed.

ii) The cell wall is completely permeable and allows both water and salt. The cell membrane of the root is selectively permeable membrane which allows only selective things to pass through it.

$\bold{\tt\pink{THANKS}}$