Advertisements
Advertisements
प्रश्न
Briefly explain how the rate of transpiration is affected by
Intensity of light
उत्तर
During the day, the stomata are open to facilitate the inward diffusion of carbon dioxide for photosynthesis. At night they are closed. Hence more transpiration occurs during the day. During cloudy days, the stomata are partially closed and the transpiration is reduced.
APPEARS IN
संबंधित प्रश्न
Mention the two ways in which transpiration helps the plants.
(a) State whether the following statements are True Or False?
(b) Rewrite the false statements,in the correct form by changing either the first or the last word only .
Voltmeter is an instrument used for measuring the rate of transpiration in green plants.
From which structure cuticular transpiration occur in plants?
Explain the Term
Lenticel
Name the following:
Plants in which lenticular transpiration.
State the Location:
Lenticels
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Transpiration | (a) Cacti plants |
| (ii) Movement of water | (b) Stomata |
| (iii) Guttation | (c) Maize plant |
| (iv) Low rate of transpiration | (d)Xylem |
| (v) The high rate of transpiration | (e) Hydathodes |
An outline sketch of a tree is shown in a diagram below. Study the same and answer the questions that follow:
- Name and define the phenomenon labelled A in the diagram.
- Write the significance of the process mentioned in A for the plants.
- What do the direction of the arrows in B and C indicate? Name the phenomena.
- Draw a neat and labelled diagram of an opened stomata.
