Long Distance Transport of Water

Q. Transpiration is useful for plants. Justify.

Q.

Instead of a leafy twig if we take a single flower with a long stalk in a test tube and fill it with water covered by a layer of oil on its surface will there be any loss of water?

Q.

Which of the following forces contribute to the ascent of sap

1. Root pressure

2. Adhesion

3. Transpiration pull

4. All of these

Q.

The ascent of xylem sap depends on _______.

1. Cohesion of water molecules

2. Adhesion of water molecules

3. Transpiration pull

4. All of these

Q.

Roots absorb minerals by ____________and _______________.

Q.

Water acts as a ……… for the transport of minerals and other nutrients.

Q.

Identify the correct set of statements related to the movement of substances through vascular tissues.

I. Xylem mainly translocates water, minerals salts and also organic solutes.

II. Phloem mainly translocates a variety of organic solutes and also inorganic solutes.

III. Xylem transports substances from roots to aerial parts of the plants.

IV. Phloem transports substances bidirectionally.

1. I & III only

2. II & IV only

3. I & II only

4. I, II, III & IV

Q.

What do you understand by active transportation of minerals?

Q. Absorbed water is conducted in plant body through ___ .

1. xylem
2. phloem
3. roots
4. stomata

Q. Mineral salts which are absorbed from the soil by the roots are in the form of

1. Very dilute solution
2. Concentrated solution
3. Very concentrated solution
4. Dilute solution

Q. What is water and mineral transported in plants?

Q. ___________ helps in the upward movement of water from roots to the leaves in tall trees.

1. Translocation

2. Transpiration

3. Gravity

4. Root pressure

Q. Who gave the cytochrome pump theory?

1. Sachs
2. Lundegardh
3. Bose and Renner
4. Bennet and Clark

Q.

The driving force for the translocation of organic solutes through phloem is __ gradient

Q.

Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?

1. Breakdown of ATP.

2. Cohesion of water and transpiration pull.

3. Root pressure.

4. Capillary rise of water in xylem.

Q. Minerals salts are translocated through _______.

1. Water tube
2. Both A and B
3. Xylem
4. Phloem

Q.

Absorbed water is conducted in plant body through ___ .

Q.

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of :

1. Lignified thick walls

2. Cohesion and adhesion

3. Weak gravitational pull

4. Transpiration pull

Q.

The path of water from the soil in to the xylem of the root is:

1. Soil - root hair - cortex - endodermis - pericycle - xylem

2. Soil - cortex - root hair - pericycle - xylem

3. Soil - root hair - endodermis - cortex - pericycle - xylem

4. Soil -root hair -cortex - pericycle - endodermis - xylem

Q. The major driving force for transport of water through xylem during the day is _________ and during the night, it is ________.

a) root pressure, transpiration
b) transpiration, root pressure
c) diffusion, osmosis
d) active transport, transpiration