Which of the following adaptations helps reduce transpiration in xerophytes?
Large, thin leaves
Sunken stomata
Numerous stomata on the upper leaf surface
Thin cuticle
Related Questions
Which of the following factors does NOT directly influence the opening and closing of stomata?
Light intensity
Carbon dioxide concentration
Water availability
Temperature
Identify the correct statements from the following:
I.Accumulation of ions in the guard cells does not require energy.
II.A high pH favours stomatal opening.
III.    Movement of chloride ions into the guard cells accrues in the response to the electrical differential created by ions.
IV.    With the entry of several ions and chloride ions, the water potential of guard cells increases
I and III
I and II
II and III
III and IV
    Why the tropical deciduous forest trees shed their leaves?
To save energy
To protect itself from chat
To enhance rate of respiration
To prevent loss of water
The hormone widely used as anti-transparent?
Cytokinin
ABA
Silicon gels
GA
    The antitranspirant is
    PMA
ABA
Both (A) and (B)
None of these
Arrange the events of opening stomata in correct sequence and choose the correct option accordingly I. Lowering of osmotic potential of guard cells II. Decline in guard cell solute III. Rise of potassium ion level in guard cells IV. Guard cells absorb water from neighbouring epidermal cells V. Guard cells become flaccid VI. Guard cells swells and make a pore between them
III, I, IV, V
I, II, III, IV, V, VI
III, I, IV, VI
III, I, IV, VI, II, V
Stoma opens, when
    Guard cells swell due to an increase in their water potential
    Guard cells swell by endosmosis due to influx of hydrogen ions (protons)
    Guard cells swell by endosmosis due to efflux of potassium ions
    Guard cells swell due to a decrease in their water potential
    The epidermal trichomes help in
    Transpiration and exchange of gases
Protection from desiccation
Protection and reduction of transpiration
Exudes water drops from their tips
Water is lost in a liquid state in some plants through hydathodes. These hydathodes
    Remain closed at night
    Remain closed during day
    Remain always open
    Do not show any specificity in opening and closing
    The phytohormone, which increases the concentration of potassium in guard cells is also responsible for the induction of
    Apical dominance
Triple response growth
Cell division
Abscission
