Tag: transpiration

Quizzes (10) Questions (96)

Questions Related to transpiration

Multiple choice transpiration major activities of living organisms biology

Percolation of soil water to water table occurs through

  1. Micropores less than 0.2 $\mu $m
  2. Micropores between 0.2 to 20.0 $\mu $m
  3. Macropores between 20-50 $\mu $m
  4. Macropores bigger than 50 $\mu $m
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Infiltration is downward entry of water into the soil whereas percolation is the downward flow of water through soil. Percolated water reaches deep in the soil to water table. Percolation of water first occurs through macropores that are bigger than 50 micron. These are present between soil particles and microspores. Later, percolation occurs through microspores.

Thus, the correct answer is option D.

Multiple choice transpiration major activities of living organisms biology

Wetting of dried soil surface automatically during night without rain is

  1. Night recovery

  2. Dew wetting

  3. Mist formation

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

During night, the dried soil surface becomes wet. This is due to the water droplets that forms a thin layer due to condensation. This is called as night recovery. As the soil surface cools at night by radiating its heat, moisture present in the atmosphere condenses. This results in the formation of water droplets on the soil. At night as the air cools to the dew point, condensation occurs and soil becomes wet without rain.

Thus, the correct answer is option A. 

Multiple choice transpiration major activities of living organisms biology

Night recovery is caused by

  1. Condensation of water vapours

  2. Local rain

  3. Capillary movement

  4. Both A and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During night, the dried soil surface becomes wet. This is due to the water droplets that forms a thin layer due to condensation. This is called as night recovery. As the soil surface cools at night by radiating its heat, water vapour present in the atmosphere condenses. This results in the formation of water droplets on the soil. At night as the air cools to the dew point, condensation occurs and soil becomes wet without rain.

Thus, the correct answer is option A. 

Multiple choice transpiration major activities of living organisms biology

Choose the correct answers from the alternatives given.
The rate of transpiration in plants is more when

  1. Atmosphere is dry

  2. Temperature is high

  3. Atmosphere is humid

  4. Atmosphere is dry and temperature is high
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dry atmosphere means lack of moisture content in the air. Due to this, air has a lot of capacity to hold water and thus the rate of transpiration increases.

Similarly, high temperatures evaporate the water at a much higher rate thus again increasing the rate of transpiration. Humid atmosphere already contains a lot of moisture and can not hold more water and thus transpiration rate decreases.
Hence, the correct answer is 'Atmosphere is dry and the temperature is high'.

Multiple choice transpiration major activities of living organisms biology

Choose the correct answers from the alternatives given.
Loss of water from the plants in the form of vapour state is known as

  1. Guttation

  2. Imbibition

  3. Transpiration

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

  • Water loss from the leaves in the form of water vapour through the openings called stomata is called transpiration.
  • Imbibition is a phenomenon that refers to the absorption of one substance by another, usually uptake of water by a plant or a seed.
  • Guttation is excretion of xylem sap on the tips of some plants through pores called hydathodes.
  • Translocation is the movement of the material from the source to sink inside the plant. Example, movement of starch from leaves to roots or other plant parts.
Hence, the correct answer is 'Transpiration'.

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

Which one of the following is not related to guttation?

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which condition favors guttation?

  1. High humidity

  2. Low humidity

  3. More transpiration

  4. Bright sunlight
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Loss of water from tips of leaves is 

  1. Transpiration

  2. Guttation

  3. Bleeding

  4. Respiration
Reveal answer Fill a bubble to check yourself
B Correct answer
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.
Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttation occurs through

  1. Stomata

  2. Lenticels

  3. Cuticle

  4. Hydathodes
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Guttation is found in

  1. Mirabilis

  2. Colocoasio

  3. Mango

  4. Ficus
Reveal answer Fill a bubble to check yourself
A Correct answer
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’.