Question

Why plants absorb a large quality of water from the soil and then give it off by transpiration

Answer 1

Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor. Of all the water absorbed by plants, less than 5% remains in the plant for growth.

Plants absorb minerals and nutrients from the soil in liquid form through Osmosis so they have to absorb much water even to take up small quantities of these nutrients.The excess of water is of no use for the plant so it gets rid of it through transpiration, also evaporation of this excess water from the leaves has a cooling effect on the plant and protects it from scorching in summer that is why in summer there is relatively more transpiration than in winter .

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Answer 2

Why do plants absorb a large quantity of water from the soil and then give it off by transpiration?

Plants absorb minerals and nutrients from the soil in liquid form through Osmosis so they have to absorb much water even to take up small quantities of these nutrients.The excess of water is of no use for the plant so it gets rid of it through transpiration, also evaporation of this excess water from the leaves has a cooling effect on the plant and protects it from scorching in summer that is why in summer there is relatively more transpiration than in winter .

Hope this helps u..