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प्रश्न
Why do plants need nitrogen? How do plants obtain nitrogen?
उत्तर
Plants need nitrogen for making proteins and other compounds. Plants obtain nitrogen from the soil.
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संबंधित प्रश्न
How would you test the presence of starch in leaves?
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(i) cloudy day in morning but bright sunshine in the afternoon
(ii) no rainfall in the area for a considerable time.
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(a) xylem vessels
(b) sieve tubes
(c) companion cells
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