THE CELL
STRUCTURE AND FUNCTION OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Xylem carries nutrients to the cells, and phloem carries water.
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Xylem are small and round cells, and phloem are long and tube-likecells.
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Xylem are long and tube-like cells, and phloem are round small cells.
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Xylem carries water to the other cells, and phloem carries nutrients to the other cells.
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Detailed explanation-1: -Xylem carries water and minerals from the roots to the leaves. Whereas, phloem carries the food prepared by the leaves to different parts of the plant.
Detailed explanation-2: -The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root. They are stacked end to end in the center of the plant, forming a vertical column that conducts water and minerals absorbed by the roots upward through the stem to the leaves.
Detailed explanation-3: -Xylem transports water and minerals. Phloem transports sugars and amino acids dissolved in water.
Detailed explanation-4: -How is transportation of water in xylem tissue different from translocation of food in phloem tissue ? Solution : Physical forces help in transportation of water in xylem while translocation of food in phloem is achieved by utilizing energy.
Detailed explanation-5: -Procambium formation and xylem differentiation are directed by auxin. In angiosperms, thermospermine, a structural isomer of spermine, suppresses xylem differentiation by limiting auxin signalling.