Prepare for NEET Biology Transport in Plants with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to understand xylem, phloem, and movement of water.
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
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
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
Read the following statements and choose the correct answer from the options given below
No cats are reptiles.
Some cats are reptiles.
All cats are reptiles.
Some reptiles are warm-blooded.
Which of the following statements is/are not true?
I.In CAM plants, stomata open during dark and remain closed during the day. II.Role of in stomatal opening is now universally accepted.
III.The water potential of root cells is higher than the water potential of soil. IV.Capillarity theory is the most accepted theory of water movement through plants. V.The walls of xylem vessels made up of lingo-cellulose have strong affinity for water molecules.
I and II
III, IV and V
I, III and V
II, III and IV
Stomata open and close due to
Turgor pressure change
Hormonal change
Temperature change
All of these
Which of the following get accumulated in the vacuoles of guard cells during stomatal opening?
Water, calcium and magnesium
Starch, potassium and chloride ions
Malate, sodium and potassium ions
Malate, potassium and chloride ions
Stomatal opening is affected by
Nitrogen concentration, carbon dioxide concentration and light
Carbon dioxide concentration, temperature and light
Nitrogen concentration, light and temperature
Carbon dioxide concentration, nitrogen concentration and temperature
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
Which of the following facilitates opening of stomatal aperture?
Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
Contraction of outer wall of guard cells
Decrease in turgidity of guard cells
Radial orientation of cellulose microfibrils in the cell wall of guard cells
