Guttation

Q.

Select the incorrect statement regarding imbibition:

1. Water is absorbed by germinating seeds through imbibition.

2. The liquid which is imbibed is called imbibate.

3. Imbibition is the phenomenon of adsorption of water or any other liquid without forming a solution.

4. There occurs a decrease in the volume of imbibant during imbibition.

Q. Explain why a land plant may die if its roots remain waterlogged for along time?

Q.

Which pressure is responsible for guttation?

Q.

What is responsible for guttation?

(a) Osmotic pressure (b) Root pressure

(c) Suction pressure (d) Capillarity

Q.

Guttation takes place through

(a) stomata (b) lenticels

(c) lower epidermis of leaves (d) hydathodes

Q.

Droplets of water may sometimes be seen along the margins of the leaves of a banana plant, growing in wet soil, in the mornings. Are these dew drops ? Comment upon your answer.

Q.

Have you ever seen dead cells? Think of some parts of plants and animals including human beings that are composed of dead cells. Do you think dead cells play an important role in the body of plants and animals? If yes, give reasons to justify your answer.

Q. The number of glucose molecules present in 10 ml of decimolar solution is

Q. The main conducting part inside the capsule of Funaria is:

1. Columella
2. Apophysis
3. Spore sac
4. Seta

Q.

What tissues are found in Cnidaria?

Q. Mention the exact location of the following. Hydathodes

Q.

The process of guttation takes place

1. when the root pressure is high and the rate of transpiration is low

2. when the root pressure is low and the rate of transpiration is high

3. when the root pressure equals the rate of transpiration

4. when the root pressure as well as rate of transpiration are high

Q.

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

1. diffusion

2. guttation

3. transpiration

4. imbibition

Q. Select the matched ones.
(i) Guttation - Water loss in liquid phase.
(ii) Adhesion - Mutual attraction between water molecules.
(iii) Imbibition - Absorption of water by dry wood.
(iv) Hypotonic solution - Cells shrink.

1. i, ii and iii only
2. ii and iv only
3. iii and iv only
4. i and iii only

Q. Explain why plant may die if its roots remain waterlogged for a long time ?

Q. What do you mean by guttation ? Explain with example.

Q.

Identify the odd one in the set given below and name the category to which the remaining three belong.

Transpiration, photosynthesis, phagocytosis, guttation.

Q. Mention whether the following statement is true or false and give explanation in support of your answer.
Guttation in plants occurs maximum at mid-day.

1. True
2. False

Q. Hydathodes are present on the

1. Upper surface of leaf
2. Lower surface of leaf
3. Base of veins of leaf
4. Tip of vein of leaf

Q.

Define the following terms-

Guttation

Q. Which one is true about guttation?

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

Q.

Give scientific reasons for the following statement.

Balsam plants wilt during mid-day even if the soil is well watered.

Q. What is Guttation?

Q. Guttation takes place through

1. Lenticels
2. Pneumatophores
3. Stomata
4. Hydathodes

Q. Water drops present on leaf margins of Tropaeolum, Balsam and grasses in early morning are due to

1. Guttation
2. Dew
3. Osmosis
4. Transpiration

Q.

Define the following term:

2. Guttation

Q. Which of the following can be used in place of germinating seeds to study aerobic respiration and why?:- Boiled eggs, Flower buds, Frozen peas.

Q. Name the pores through which guttation occurs.

Q. Water exudation through hydathodes is

1. Guttation
2. Transpiration
3. Hydrolysis
4. Excretion

Q. Guttation is the release of liquid water from veins at the leaf margins. It is caused by

1. Transpiration
2. High leaf pressure
3. Clogged tracheids or vessel elements.
4. High root pressure