Tag: transpiration

Quizzes (10) Questions (96)

Questions Related to transpiration

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Loss of water from the tip of the leaf pores in a plant is known as 

  1. Transpiration.

  2. Guttation.

  3. Evaporation.

  4. Respiration.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The 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 is given out from the roots through pores or edge of leaves and this process is called guttation. Thus the correct answer is option B.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Transpiration occurs through .......... and guttation occurs through .......... in the plants.

  1. Hydathodes, stomata

  2. Stomata, cuticle

  3. Stomata, hydathodes

  4. Hydathodes, lenticles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transpiration is the process in which water vapors are released from the stomata. Guttation is the process of release of water droplets from the hydathodes.

So, the correct answer is 'Stomata, hydathodes'.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttation is caused due to

  1. Imbibition

  2. Osmosis

  3. Positive root pressure

  4. Transpiration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Guttation is the loss of water in liquid form as a dilute solution from uninjured leaf tips. The uninjured leaf tips have hydathodes or water stomata. Under conditions of low transpiration dilute solution of minerals oozes out through them under the influence of increased root pressure.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

The continuous excretion of watery substance from stump of a well watered pot plant after cutting off the shoot slightly above the base is due to

  1. Root pressure

  2. Guttation

  3. Transpiration

  4. Imbibition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Root pressure is osmotic pressure within the cells of a root system. Root pressure is generated by active uptake of minerals by roots, which lowers water potential of root cells and water flows inside the cells along its concentration gradient. Thus, on the cutting of shoot, excretion of watery substance from cut side occurs.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

The loss of water in the form of water drops is known as

  1. Transpiration

  2. Respiration

  3. Guttation

  4. Exomosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves.

Respiration  is a process in which living organisms produces energy, with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
Guttation is the loss of water in the form of water droplets from hydathodes (small pores) on the leaf margin of a plant.
The passage of material through a semi-permeable membrane from a region of higher to a region of lower concentration, especially the passage of water through a cell membrane into the surrounding medium, is called exosmosis. 
Thus, the correct answer is option (C).

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttational drop comprises 

  1. Simple water

  2. Water and various salts dissolved in it

  3. Water and inorganic salts

  4. Water and organic cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Guttation is the loss of water in the form of droplets along the margin and tips through special structures called hydathode. The guttational drops comprise of water various salts dissolved in it. 
Thus, the correct answer is option (B). 

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttation is from

  1. Uninjured edges of leaves near vein endings

  2. Epidermal layers of leaf surface

  3. Injured edges of leaves

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Guttation is the loss of water in the form of liquid from the uninjured margins of the leaves is called guttation. The pores are known as hydathodes. The level of soil moisture is high which creates greater root pressure. This root pressure creates a force which allows exudation of water from the tips. It is favored when the transpiration is suppressed and the relative humidity is high
Thus the correct answer is option (A). 

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Water exudation through hydathodes is 

  1. Guttation

  2. Transpiration

  3. Hydrolysis

  4. Excretion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water exduation through hydathodes is known as guttation. Guttation is the process of loss of impure water (a dilute solution of different organic and inorganic substances) 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 hydrathodes. Each hydrathode is made up of group of loosely arranged achlorophyllous or colorless and parenchymatous cells called epithem. These cells help in absorbing a good percentage of inorganic and organic solutes present in the exudate. 

So, the correct answer is option A.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttation occurs in well-watered herbaceous plants of well-drained soils during

  1. Evening

  2. Morning

  3. Day

  4. Noon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Guttation is the moisture emitted by plants during night time.

Mainly it is caused by due to root pressure. At night time in absence of transpiration water will get accumulated in roots and it will cause root pressure due to high soil moisture level. in this condition, plants emit water in form of droplets it is called as guttation. So droplets are emitted during morning time in well-watered herbaceous plants of well-drained soil.
So the correct answer is 'Morning'.