Adhesion

Q.

What is capillarity? Give some application of capillarity.

Q. Adhesion is one of the physical properties of water that refers to

1. mutual attraction between water molecules
2. attraction of water molecules to other substances
3. strong affinity of water molecules in liquid phase
4. repulsion between water molecules

Q.

The force of attraction between molecules of the different substances is known as _______.

Q. All of the following enhance water transport in terrestrial plants except

1. hydrogen bonds linking water molecules
   
2. evaporation of water from the leaves
   
3. capillary action due to adhesion of water molecules to the walls of xylem
   
4. K+ being transported out of the guard cells

Q.

The movement of water and dissolved minerals from the roots to the leaves is best explained by

1. Translocation

2. Cohesion-tension theory

3. Pressure-flow hypothesis

4. Tensile strength

Q. A twig kept in water having some salt remains fresh for longer period due to

1. decrease in bacterial degradation
2. exosmosis
3. decrease in transpiration rate
4. absorption of more water

Q. In Plants, water supply is due to_______

1. osmosis
2. imbibition
3. guttation
4. adhesion force

Q. Which of the following methods of transport is fastest?

1. Diffusion
2. Ascent of sap
3. Phloem transport of organic food
4. Cytoplasmic streaming

Q. In Plants, water supply is due to_______

1. osmosis
2. imbibition
3. guttation
4. adhesion force

Q. Which of the following events is more rapid?

1. Suction of water and minerals due to transpiration pull.
2. Cyclosis in cell cytoplasm.
3. Sugar transport in phloem.
4. Distribution of hormones from one part to another.

Q. Adhesion is the attraction of water molecules to some other surface.

1. True
2. False

Q.

What is the importance of tension that is created during transpiration?

Q.

Define the terms.

Cohesion and adhesion properties of water molecules

Q. Match List - I with List -II


$\begin{array}{cccc}& \text{List - I}& & \text{List - II}\\ \text{(a)}& \text{Cohesion}& \text{(i)}& \text{More attraction in}\text{liquid phase}\\ \text{(b)}& \text{Adhesion}& \text{(ii)}& \text{Mutual attraction}\text{among water molecules}\\ \text{(c)}& \text{Surface tension}& \text{(iii)}& \text{Water loss in liquid phase}\\ \text{(d)}& \text{Guttation}& \text{(iv)}& \text{Attraction towards}\text{polar surfaces}\end{array}$

Choose the correct answer from the options given below :

1. $\left(a\right):\left(iv\right);\left(b\right):\left(iii\right);\left(c\right):\left(ii\right);\left(d\right):\left(i\right))$
2. $\left(a\right):\left(ii\right);\left(b\right):\left(i\right);\left(c\right):\left(iv\right);\left(d\right):\left(iii\right))$
3. $\left(a\right):\left(iii\right);\left(b\right):\left(i\right);\left(c\right):\left(iv\right);\left(d\right):\left(ii\right))$
4. $\left(a\right):\left(ii\right);\left(b\right):\left(iv\right);\left(c\right):\left(i\right);\left(d\right):\left(iii\right))$

Q. Which of these statements is true

1. ABA opens stomata.
2. ABA opens stomata while cytokinin closes stomata.
3. ABA closes while cytokinin opens stomata.
4. ABA and cytokinin do not affect stomata.

Q. Water from the soil enters into the root hairs on account of

1. Turgor pressure
2. Suction pressure or DPD
3. Barometric pressure
4. Osmotic pressure

Q. Arrange the root hair, cortical cell and mesophyll cell in ascending order on the basis of DPD

1. Root hair < cortical cell < mesophyll
2. Cortical cell < mesophyll < root hair
3. Mesophyll < root hair < cortical cell
4. Root hair < mesophyll < cortical cell

Q. All of the following enhance water transport in terrestrial plants except

1. hydrogen bonds linking water molecules
   
2. capillary action due to adhesion of water molecules to the walls of xylem
   
3. evaporation of water from the leaves
   
4. K+ being transported out of the guard cells

Q. A column of water within xylem vessels of tall trees does not break under its weight because of

1. lignification of xylem vessels
2. positive root pressure
3. dissolved sugars in water
4. tensile strength of water

Q. Adhesion is the attraction of water molecules to some other surface.

1. True
2. False