Stomata: Opening and Closing
Formation of drops of water along leaf margin due to excessive root pressure is called
The cell wall of root hair is thin and _____.
Stomata of a plant open due to:
Influx of potassium ions
Efflux of potassium ions
Influx of hydrogen ions
Influx of calcium ions
Water evaporates from tiny pores on leaves. These pores are known as
Stomatal apparatus does not include ________.
Select the correct events leading to opening of the stomata.
I. Decline is guard cells solutes.
II. Lowering of osmotic potential of guard cells.
III. Rise in potassium levels in guard cells.
IV. Movement of water from neighbouring cells into guard cells.
V. Guard cells becoming flaccid.
Select the correct answer using the codes given below.
I and V
II, III and IV
I, III and IV
II, IV and V
In a hypertonic solution, the water molecules will move from
Which of the following cells are not related to the structure of stomata?
In CAM plants, stomata are:
Open during the day and close at night
Open during night and close during day
- Starch, potassium and chloride ions
- Malate, potassium and chloride ions
- Malate, sodium and potassium ions
- Water, calcium and magnesium