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प्रश्न
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in the correct form by changing either the first or the last word only.
Most transpiration occurs at midnight.
विकल्प
True
False
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उत्तर
(a) This statement is false.
(b) Most transpiration occurs at mid-day.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration is the loss of water from the roots of the plant.
Fill in the blank with the suitable term given below:
Transpiration is more when the wind is blowing _____.
- 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.
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?
______ involves evaporative loss of water from aerial parts.
Identify the wrong statement and correct it.
Leaves perform the function of transpiration only.
Describe briefly the three physical properties of water which helps in ascent of water in xylem.
Do different species of plants growing in the same area show the same rate of transpiration at a particular time? Justify your answer.
Keep some freshly cut flowers in a solution of food colour. Wait for sometime for the dye to rise in the flower, when the stem of the flower is held up in light, coloured strands can be seen inside. Can this experiment demonstrate which tissue is conducting water up the stem?
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.
