Advertisements
Advertisements
Question
Guard cells are responsible for the opening and closing of stomata.
Solution
Opening and closing of stomata take place due to changes in the turgor of the guard cell. The turgor changes in the guard cells are due to the entry and exit of water into and out of the guard cells. During the day, water from the subsidiary cells enters the guard cells making them fully turgid causing the stomata to open. During the nighttime, water from guard cells enters the subsidiary cells makes the guard cells flaccid causing the stomata to close.
APPEARS IN
RELATED QUESTIONS
Water reaches great heights in the trees because of suction pull caused by ______.
(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.
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in dark.
Choose the correct answer:
The percentage of cuticular transpiration in plants is _____________
What are stomata? What governs the opening and closing of stomata?
Give the importance of transpiration?
Describe briefly the three physical properties of water which helps in ascent of water in xylem.
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?
Briefly describe the following:
Angina Pectoris
The process of evaporative loss of water from the aerial parts of a plant is ______.
