Which of the following phenomena is not associated with root pressure?

  • A
    Sap exudation
  • B
    Bleeding
  • C
    Guttation
  • D
    Transpiration

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The phenomenon of guttation:

Which of the following statements are correct regarding the factors affecting the absorption of water by plants?
$(i)$ In plants,the rate of water absorption is minimum at a soil temperature of $20^{\circ}C$ to $30^{\circ}C$.
(ii) The presence of capillary water is essential in the soil.
(iii) Poorly aerated soil shows a poor absorption rate.
(iv) $A$ low transpiration rate accelerates the rate of absorption of water in irrigated soil.
$(v)$ $A$ high concentration of solutes in soil water reduces the rate of absorption of water.

Correct the following statements:
$(a)$ Cells shrink in hypotonic solutions and swell in hypertonic solutions.
$(b)$ Imbibition is a special type of diffusion when water is absorbed by solids—colloids—causing them to increase in volume.
$(c)$ Most of the water flow in the roots occurs via the symplast.

Match List-$I$ with List-$II$.
List-$I$List-$II$
$(a)$ Cohesion$(i)$ More attraction in liquid phase
$(b)$ Adhesion$(ii)$ Mutual attraction between water molecules
$(c)$ Surface tension$(iii)$ Water loss in liquid phase
$(d)$ Guttation$(iv)$ Attraction towards polar surfaces

Choose the correct answer from the options given below:

From a physiological perspective,why does a high water content in soil particles lead to a dry process (physiological drought)?

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