Advertisements
Advertisements
प्रश्न
How does transpiration help in the uptake of water from the soil?
Advertisements
उत्तर १
Transpiration is the loss of water in vapour form from the leaves into the air. As water is used up or lost from the leaves, more is sucked up from the xylem vessels. It’s like sucking water up a straw. So there is a continuous flow of water from the roots to the leaves. This movement of water up the xylem is called the transpiration stream.
उत्तर २
As water evaporates, a suction force is created, which draws water up through the stem.
Notes
Students should refer to the answers according to their questions.
APPEARS IN
संबंधित प्रश्न
What causes the opening and closing of guard cells of stomata during transpiration?
Fill in the blank:
Water is lost from the leaves by__________.
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
What is the purpose of the spring balance in the set-up?
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
Would it make a difference if the experimental set-up is kept in bright sunshine?
Plants lose water by the process of transpiration.
Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
What is dialysis?
The radio labelled carbon in carbon dioxide supplied to potato plants in an experiment was seen in the tuber eventually. Trace the movement of the labelled carbon dioxide.
Water molecule is very polar. Polar end of molecule attracts opposite charges on another water molecule (acts like magnet). How will you explain this property of water with reference to upward movement of water? Comment on the upward movement of water given the intermolecular hydrogen bonding in water.
A root hair is derived from ______ cell.
Which of the following is an external factor affecting the rate of transpiration?
