Answer:
Plants require water to
carry out photosynthesis and other activities. The continuous flow of water in
root xylem is due to transpiration pull. The water which is lost through the
stomata is replaced by xylem vessel. Evaporation of water molecules cells of
leaf creates a suction which pulls water from the xylem of roots to leaves,
Thus, transpiration
helps in absorption and upward movement of water and minerals dissolved in it
from roots to learn.
Cells of
roots are in close contact with soil and so actively take up ions by diffusion.
The ion-concentration increases inside the root and hence osmotic pressure
increases the movement of water from soil into root which occurs continuously.
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