Tag: excretion in plants

Questions Related to excretion in plants

Guttation occurs only in

botany transpiration guttation excretion in plants long distance transport of water

  1. Hydrophytes

  2. Mesophytes

  3. Mangroves

  4. Marshy plants

Show answer
Correct Option: B
Explanation:

Guttation is the process in which plant pores secrete droplets of water.

Guttation occurs in moist conditions.
This commonly occurs in mesophytes at night when transpiration
Is not taking place due to closed stomata.
The extra water content is hence removed by this process and it can be seen on the surface of leaves as water oozes out of the hydathodes 
So the correct answer is 'Mesophytes'.

Process of water exudation from hydathodes is known as

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Transpiration

  3. Evaporation

  4. Bleeding

Show answer
Correct Option: A
Explanation:
Guttation is the process of loss of impure water from plant infact, mostly from margins of leaves. It occurs when transpiration rate is very low as compared to rate of water absorption. Due to this root pressure is developed and water is pushed out through specialized pores at vein endings called hydathodes. Each hydathode is made up of group of loosely arranged achlorophyllous or colourless and parenchymatous cells called epithem. These cells help in absorbing a good percentage of inorganic and organic solutes present in the exudate. Thus guttation is due to the positive pressure in the xylem developed due to the root pressure.
So, the correct answer is option A.

Identify the wrong statement.

botany transpiration guttation excretion in plants long distance transport of water

  1. The degree of decrease of chemical potential of water depends on the concentration of solute.

  2. Bacteria and fungal spores are killed in pickles and jams dues to plasmolysis.

  3. Process of water exudation is called transpiration.

  4. Reverse plasmolysis will occur when flaccid cells are placed in hypotonic solution.

Show answer
Correct Option: C
Explanation:

As the concentration of solute increases, water potential decreases.

Pickles and jams are very concentrated in terms of solute content which leads to severe water loss from bacterial cells and fungal spores.
Water exudation occurs when small droplets of water are released from hydathodes and this process is known as guttation.
When flaccid cells are placed in hypotonic solution then they will absorb a large amount of water and this process is known as Reverse plasmolysis.
So the correct answer is 'Process of water exudation is called transpiration'.

Water lost through the process of guttation is in

botany transpiration guttation excretion in plants long distance transport of water

  1. Liquid form containing dissolved minerals

  2. Liquid form without dissolved minerals

  3. Vapour form with minerals

  4. Vapour form without minerals

Show answer
Correct Option: A
Explanation:

Water lost through guttation is in the form of water droplets which also take minerals along with them. Since it is in liquid form, it can dissolve minerals in too.

It is not in the form of vapours as in the case of transpiration. The vapours flow not take minerals with them.
So the correct answer is 'Liquid form containing dissolved minerals'.

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.

botany transpiration guttation excretion in plants long distance transport of water

  1. i, ii and iii only

  2. ii and iv only

  3. iii and iv only

  4. i and iii only

Show answer
Correct Option: D
Explanation:

Loss of water in the form of water droplets from the pores of plants is called as guttation. Adhesion is the mutual attraction between unlike molecules that results in the sticking together of those molecules to one another. Imbibition is a type of diffusion in which water is absorbed by solid material like dry wood that results in an increase in volume. When a cell is placed in a hypotonic solution, there is more solute concentration in the cell than in the solution. Water moves from lower concentration of solute (solution) to higher concentration of solute (cell). This results in the swelling of cell. 

Thus, the correct answer is option D.

The process of release of water through and intact plant is called.

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Exudation

  3. Oozing

  4. Leakage

Show answer
Correct Option: A

Loss of water from tip of leaves is called 

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Transpiration

  3. Evaporation

  4. Respiration.

Show answer
Correct Option: A
Explanation:

Transpiration is the process in which water vapours are released from the stomata.

Respiration is a metabolic process in which oxygen is used to break down food and carbon dioxide and energy are released.
Evaporation is the process of conversion of liquid water into water vapour.
Guttation is the process of loss of water droplets from pores known as hydathodes and tips of leaves.
So the correct answer is 'Guttation'.

Loss or excretion of water in the form of liquid droplets from the margins and tips of leaves is called

botany transpiration guttation excretion in plants long distance transport of water

  1. Transpiration

  2. Guttation

  3. Bleeding

  4. Precipitation

Show answer
Correct Option: B
Explanation:
The loss or excretion of water in the form of liquid droplets from the leaves and other parts of uninjured or intact plant is called guttation. It was first studied by Bergerstein in 18871887. All plants do not show guttation. It is restricted to about 345345 genera of herbaceous and some woody plants. Common examples are garden nasturtium, oat and other cereals, balsam, tomato, cucurbits, Guttation takes place through special structures called hydathodes. They are usually found on the margins and tips of the leaves.
So, the correct answer is 'Guttation'.

Stomata : Transpiration : : Hydathode : ___________.

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Root pressure

  3. Bleeding

  4. Oozing

Show answer
Correct Option: A
Explanation:
The process of exudation of liquid drops from the edges of leaves is called guttation. Usually it occurs through stomata-like pores called hydathodes. It is this process by which fully turgid plant remove extra water. The cause of guttation is mainly root pressure(when the root pressure is high and rate of transpiration is low, guttation takes place). Hydathodes are stomata-like pores, generally present at the tips or margins of leaves of those plants that grow in moist shady places(e.g., Tropaeolum). So, the correct answer is 'Guttation'.

The process of guttation takes place

botany transpiration guttation excretion in plants long distance transport of water

  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

Show answer
Correct Option: A
Explanation:
The process of exudation of liquid drops from the edges of leaves is called guttation. Usually it occurs through stomata-like pores called hydathodes. It is this process by which fully turgid plants remove extra water. The cause of guttation is mainly root pressure(when the root pressure is high and rate of transpiration is low, guttation takes place). Hydathodes are stomata like pores generally present at the tips or margins of leaves of those plants that grow in most shady places (e.g) Tropaeolum).
So, the correct answer is 'When the root pressure is high and the rate of transpiration is low'.