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Subjects
Science CBSE
Class 7
Transportation in animals and plants
Textbook questions II
19.
Short answer X
Exercise condition:
3
m.
Paheli noticed water being pulled up by a motor-pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell why?
Water loss through leaves creates a suction that pulls water upward.
Water and minerals are absorbed by the roots from the soil.
Water molecules stick together and to the xylem walls, helping to transport water up the tree.
Water and minerals are absorbed by the roots from the air.
Water loss through root creates a suction that pulls water downward.
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