Guttation

Q.

Why the effect of root pressure in the transport of water is more important at night?

Q.

Why do CAM plants close their stomata during the day?

Q. Guttation is the process of exudation of water and minerals from plants through

1. stomata
2. hydathodes
3. lenticels
4. root hairs

Q. Which of the following statement(s) for hydathodes is/are correct?

1. Open to release excessive water from leaves
2. Contain a loosely arranged cells called epithem
3. These are found at the tips of the leaves
4. All the above

Q.

In the absence of transpiration water moves into and up the xylem because of

1. root pressure

2. turgor pressure

3. high soil mineral concentration

4. evaporation

Q.

The force responsible for guttation in herbaceous plants is

1. Transpiration

2. Root pressure

3. Osmosis

4. Photosynthesis

Q.

Give reason:

Water is pulled from the roots to the top of the plant.

Q. In tomato plants, drops of water are seen along leaf margins in the morning because of

1. guttation
2. plasmolysis
3. transpiration
4. imbibition

Q. Choose the correct option/s related to guttation.

1. Loss of water in plants
2. Water is lost through hydathodes
3. Loss of water in vapour form
4. Water is lost in liquid form

Q.

Guttation is

1. movement of soluble organic materials through plants.

2. evidence of root pressure.

3. negative pressure created by transpiration.

4. movement of water through the apoplast.

Q. Which of the following is a rapid type of water absorption?

1. Active absorption
2. Passive absorption
3. Continuous absorption
4. Pulsating absorption

Q. The water drops seen at vein endings of certain herbaceous plants in early mornings is due to

1. guttation
2. transpiration
3. bleeding
4. exudation

Q. Guttation suggests that

1. there is water logging around roots
2. rate of absorption is greater than rate of transpiration
3. plant is transpiring rapidly
4. there is absorption lag in plants

Q. Match the columns and find out the correct combination:

1. A - 3, B - 1, C - 4, D - 2
2. A - 1, B - 4, C - 2, D - 3
3. A - 4, B - 1, C - 2, D - 3
4. A - 2, B - 3, C - 4, D - 1

Q. Guttation is the process of exudation of water and minerals from plants through

1. stomata
2. hydathodes
3. lenticels
4. root hairs

Q. Ascent of sap is

1. Upward movement of water in the plant.
2. Downward movement of organic nutrients.
3. Downward and upward movement of water in the plant.
4. Redistribution of inorganic substances in the plant.

Q. In tomato plants, drops of water are seen along leaf margins in the morning because of

1. guttation
2. transpiration
3. imbibition
4. plasmolysis

Q. Match the options given in column I with appropriate items of column II.

1. a - iii, b - iv, c - v, d - i, e - ii
2. a - i, b - ii, c - iii, d - iv, e - v
3. a - iii, b - v, c - iv, d - i, e - ii
4. a - iii, b - iv, c - ii, d - i, e - v

Q. State whether the following statements are true or false .
Guttation takes place through specialised pores called lenticels.

1. True
2. False

Q. Guttation suggests that

1. plant is transpiring rapidly
2. there is water logging around roots
3. rate of absorption is greater than rate of transpiration
4. there is absorption lag in plants

Q. In tomato plants, drops of water are seen along leaf margins in the morning because of

1. guttation
2. transpiration
3. imbibition
4. plasmolysis

Q.

How is the process of guttation different from transpiration?

Q.

Water from soil enters into root hairs owing to

1. Atmospheric pressure
2. Capillarity
3. Root pressure
4. Osmotic pressure or diffusion
5. Turgor pressure

Q. Translocation of sugars in flowering plants occurs in the form of

1. Glucose
2. Sucrose
3. Fructose
4. Maltose

Q. Root pressure develops due to

1. Increase in transpiration
2. Active absorption
3. Low osmotic potential in soil
4. Passive absorption

Q. Water droplets are seen along the leaf margins of herbaceous plants during an early morning, when evaporation is low. This phenomenon is termed ________.

1. Transpiration

2. Evaporation

3. Exudation

4. Guttation

Q.

Guttation is:

1. Movement of soluble organic materials through plants

2. Movement of water through the apoplast

3. Negative pressure created by transpiration

4. Evidence of root pressure

Q. Guttation is the result of

1. Diffusion
2. Transpiration
3. Root pressure
4. Osmosis

Q. Which one is true about guttation?

1. It only occurs during day time.
2. It occurs in plants growing under conditions of low soil moisture and high humidity.
3. It occurs in herbaceous plants when root pressure is low and transpiration is high.
4. It occurs through specialised pores called hydathodes.

Q. Doors made up of wood swell up in rainy season due to

1. transpiration
2. imbibition
3. exosmosis
4. guttation