Guttation is mainly due to
Root pressure
Imbibition
Osmosis
Transpiration
Related Questions
According to the transpiration-cohesion theory, the upward pull of water is transmitted to other water molecules by cohesion, which is caused by
Hydrogen bond
Hydrophilic cell walls
Turgor pressure
Osmosis
Which of the following best describes the relationship between the movement of water vapor and carbon dioxide through stomata?
They move in the same direction due to the same concentration gradient.
They move in opposite directions due to the same concentration gradient.
They move simultaneously but due to different concentration gradients.
They move sequentially, with one gas moving only after the other has stopped.
The term root pressure was coined by?
S.Hales
Dixon
Levitt
Bose
Cohesion theory of water movement in plants was put forth by
Melvin cycle
F F Blackman
T W Engelmann
Henry Dixon
Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure gradient are
Suction through straw and swelling of wood, respectively
Imbibition and a garden hose
Garden hose and suction through a straw, respectively
Swelling of wood and imbibition, respectively
Read the following statements and choose the correct option given below I. Major account of transpiration takes places through surface/margin of leaves II. A little amount of water is lost through stem, this is reffered to cauline transpiration III. Transpiration is comparatively a slow process then evaporation IV. Transpiration driven ascent of sap does not depend on cohesion, adhesion and surface tension properties of water
I, II, III and IV
I, II and III
I, II and IV
II, III and IV
Which of the following is the main driving force for root pressure?
Transpiration pull
Active transport of ions into the xylem
Capillary action in the xylem vessels
Photosynthesis in the leaves
Root pressure is most likely to be observed in which of the following conditions?
High temperature and high transpiration
High humidity and low transpiration
Strong winds and high light intensity
Dry soil and low humidity
Identify the incorrect one for root pressure.
Positive hydrostatic pressure
Develop due to passive absorption of water
Responsible for guttation phenomenon
It provide a gentle push in the overall process of water transport
Root pressure develops during?
Night time
Early mornings
Midafternoon
1 and 2
