WAEC Biology 2011 Theory — Question 21
Question 21 of 27 from the West African Examinations Council (WAEC) Biology 2011 Theory paper, with the correct answer and a full explanation.
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5(c) Explain how nitrogen from urine gets to the roots of plants in solution form.
Model answer
When urine is released onto the soil, urea (an ammonium compound) is converted into nitrite by nitrosomonas. Eventually, the nitrite is converted into nitrate by nitrobacter. The nitrate is then transported through the root in solution form.
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