Advertisements
Advertisements
प्रश्न
Explain the term:
Transpiration
Advertisements
उत्तर
- Transpiration is the process by which plants lose water vapor from their aerial parts, mainly through the stomata in the leaves.
- It mostly occurs during the day when stomata are open for gas exchange.
- This water loss occurs as water vapor into the atmosphere.
- Transpiration helps in the ascent of sap by creating a transpiration pull.
- It also helps in cooling the plant and maintaining water balance.
- Transpiration occurs through three main sites - cuticle, stomata, and lenticels.
APPEARS IN
संबंधित प्रश्न
How does transpiration help the roots absorb water and minerals from the soil?
- The diagram given alongside is an apparatus used to study a particular phenomenon in plants.
- Name the apparatus.
- What is it used for?
- What is the role played by the air bubble in this experiment?
- Of what use is the reservoir?
- What happens to the movement of the air-bubble if the apparatus is kept
- in dark,
- in sunlight,
- in front of fan?
Give a reason in each case.
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in dark.
The figure below represents the set-up at the start of certain experiment to demonstrate an activity of plants:
(i) What is the aim of the experiment?
(ii) Why has oil been put in each test tube?
(iii) What will be the observations in the two test-tubes after about 2-3 days?
(iv) Give reasons to explain any change observed as answered in (iii) above.
(v) Why has the test-tube b without the plant, been taken in the experiment?
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
Mention two ways in which this process is beneficial to plants.
Describe an experiment to prove that transpiration occurs more from the undersurface of dorsiventral leaves.
What type of transpiration is possible in the xerophyte Opuntia?
Plants lose water by the process of transpiration.
Excessive transpiration is due to ______.
Describe briefly the three physical properties of water which helps in ascent of water in xylem.
