Transpiration in Plants:
A tissue called xylem acts as the pipeline, and takes water and minerals from the roots up the stem, and to the leaves. Absorption of water and minerals is a continuous process. Water is continuously being lost from the leaves by the process of transpiration (loss of water vapour from the stomata of leaves).
Transpiration is the evaporation of water molecules in the form of water vapours from plant surface, especially from the stomata on leaves. It creates a suction pull which helps water to be transported to great heights in tall trees. Transpiration also cause cooling on the plant surface.Their are basically four type of transpiration:
Which of the following are correct ? (a) Transpiration is the loss of water in the form of vapor from the aerial parts of the plant. It takes place mainly through stem . (b) Transpiration helps in the absorption and upward movement of water and minerals creating a ‘transpiration pull.’ . | |||
Right Option : B | |||
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Which of the following are correct ? (a) A tissue called xylem acts as the pipeline, and takes water and minerals from the roots up the stem, and to the leaves. (b) Absorption of water and minerals is a continuous process. | |||
Right Option : C | |||
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Which of the following are correct ? (a) Lenticels are the porous tissue present on the surface of stem and leaves. (b) Bark is the inner most covering of stem which keeps on shedding as the plant grow. | |||
Right Option : A | |||
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