PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Through the roots of the plant.
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Through the top of the leaf.
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Through the pistil in the flower.
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Through the stomata in the underside of the leaf.
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Detailed explanation-1: -Root hairs absorb soil water by a special diffusion process called imbibition that takes place by both living and dead cells present on the surface of root hair. Osmosis is another process involved that pushes water into cortical cells from the root hair by creating osmotic pressure around the cells.
Detailed explanation-2: -Water moves into the roots from the soil by osmosis, due to the low solute potential in the roots (lower s in roots than in soil). This intake o f water in the roots increases p in the root xylem, driving water up.
Detailed explanation-3: -In plants, water enters the root cells by osmosis and moves into tubes called xylem vessels to be transported to the leaves. Water molecules inside the xylem cells are strongly attracted to each other because of hydrogen bonding (this is called cohesion).