Tag: excretion in plants

Questions Related to excretion in plants

Resin canals in Pinus are formed.

biology life processes guttation excretion in plants long distance transport of water

  1. By the separation of secretory cells

  2. By the destruction of secretory cells

  3. Partly by separation and partly by destruction of secretary cells

  4. By large intercellular spaces of the cortex of the stem

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Correct Option: A

Addition of hydrogen and removal of oxygen, known as

biology life processes guttation excretion in plants long distance transport of water

  1. Reduction

  2. Oxidation

  3. Suspended solids

  4. Dispersion

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Correct Option: A

Which one of the following is not related to guttation?

botany transpiration guttation excretion in plants long distance transport of water

  1. Water is given out in the form of droplets

  2. Water given out is impure

  3. Water is given out during daytime

  4. Guttation is of universal occurance

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Correct Option: C
Explanation:

In soil rich in moisture content water floods a plant root system. Leaves can retain only a finite amount of water. Excess water i.e xylem sap from the roots is given out through pores or edge of leaves in the form of droplets. This process is called guttation. As this water contains different organic and inorganic substances from the plant it is considered impure. Also, guttation is of universal occurrence. Thus the correct answer is option C.

Which condition favors guttation?

botany transpiration guttation excretion in plants long distance transport of water

  1. High humidity

  2. Low humidity

  3. More transpiration

  4. Bright sunlight

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Correct Option: A
Explanation:

Guttation is the phenomenon of the release of small water droplets from the pores of the plants. It is done in order to release the extra water out of the plant in very humid conditions. It is commonly seen in mesophytes.

During the absence of sunlight stomata are closed so there is minimal transpiration. Hence there is a need for guttation.
So the correct answer is 'High humidity'.

Loss of water from tips of leaves is 

botany transpiration guttation excretion in plants long distance transport of water

  1. Transpiration

  2. Guttation

  3. Bleeding

  4. Respiration

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Correct Option: B
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. 
So, the correct answer is option B.

Guttation occurs through

botany transpiration guttation excretion in plants long distance transport of water

  1. Stomata

  2. Lenticels

  3. Cuticle

  4. Hydathodes

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Correct Option: D
Explanation:

Hydathodes release water in the form of small water droplets and hence are responsible for guttation.

Stomata causes Transpiration and exchange of gases.
Lenticels cause exchange of gases.
Cuticle is the protective covering.
So the correct answer is 'Hydathodes'.

Guttation is found in

botany transpiration guttation excretion in plants long distance transport of water

  1. Mirabilis

  2. Colocoasio

  3. Mango

  4. Ficus

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Correct Option: A
Explanation:

Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface. At night, transpiration usually does not occur because most plants have their stomata (pores found in the epidermis of leaves, stems and other organs that are used to control gas exchange)closed. So the correct option is ' Mirabilis’.

Exudation of xylem sap on cutting of a shoot is due to

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Root pressure

  3. Transpiration

  4. None of these

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Correct Option: A

State whether the following statement is true or false. If false rewrite the correct form of the statement by changing the last word.
Exudation of sap from the injured parts of a plant is called guttation.

botany transpiration guttation excretion in plants long distance transport of water

  1. True

  2. False

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Correct Option: A

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

botany transpiration guttation excretion in plants long distance transport of water

  1. Guttation

  2. Dew

  3. Osmosis

  4. Transpiration

Show answer
Correct Option: A
Explanation:

Guttation is the loss of water in liquid form through hydathodes. Guttation is usually seen under environmental conditions when transpiration is low and soil is well watered. It occurs under the influence of positive root pressure. Water droplets present on leaf margins of some plants in the early morning is not due drops but the water that has oozed out from xylem tracheids.