Multiple choice general knowledge science & technology

Plants absorb dissolved nitrates from soil and convert them into

  1. free nitrogen

  2. urea

  3. ammonia

  4. proteins
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A Correct answer
Explanation

Plants absorb nitrates (NO3-) from soil through their roots and reduce them to form free nitrogen (N2) as part of their metabolic processes. They do not convert nitrates to urea (animal waste), ammonia (intermediate form), or directly to proteins (which are built from amino acids).

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