PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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xylem; upward and downward, phloem upward only
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xylem; upward only, phloem upward and downwards
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xylem and phloem upward only
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None of the above
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Detailed explanation-1: -Xylem carries water and minerals from roots to upper parts of the plant (leaves) only in the upward direction.
Detailed explanation-2: -The transportation of water in the xylem takes place only from the roots to the leaves. Therefore, the movement of water and nutrients in the xylem is unidirectional. However, the movement of food in the phloem is bidirectional (both upward and downward).
Detailed explanation-3: -The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root.
Detailed explanation-4: -Correct answer: Xylem transports water from the roots of a plant to the leaves.
Detailed explanation-5: -The direction of xylem transport is upwards and unidirectional i.e. from roots to other plant parts.