ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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through the stomata
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throughout the plant
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through the roots
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any of these
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Detailed explanation-1: -Nitrate moves freely toward plant roots as they absorb water. Once inside the plant, NO₃⁻ is reduced to an NH₂ form and is assimilated to produce more complex compounds. Because plants require very large quantities of nitrogen, an extensive root system is essential to allowing unrestricted uptake.
Detailed explanation-2: -To be used by plants, the N2 must be transformed through a process called nitrogen fixation. Fixation converts nitrogen in the atmosphere into forms that plants can absorb through their root systems.
Detailed explanation-3: -Nitrogen is absorbed by roots as inorganic nitrate i.e. NO3 and ammonium NH4+ ions. NO3 is converted to NH2 and assimilated to form organic compounds inside the plant. Fertilizers, as well as animal and plant waste, enrich the soil with nitrogen.