How does traspiration help in upward transport of substances?? Reply m

1.	How does traspiration help in upward transport of substances?? Reply me fast plz..
Answer» In actively growing plants, water evaporates continuously from the mesophyll cells of the leaf creating a negative pull. The lost water in the mesophyll is replaced by the absorption of water from the adjacent cells. Now water starts to pull through xylem vessels of leaves. Xylem vessels of leaves pulls water from xylem of stem which take water from Xylem of roots. Thus, water flow in a channel. This water channel is held together by cohesion force (force of attraction between water molecule). Adhesion (force of attraction between water molecules and walls of cells) and keeps the water column in the place. When water moves into the xylem, more soil water is drawn in the root. This inward movement will continue until the soil becomes excessive dry. For transpiration pull due to cohesion, adhesion and capillary action

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