Multiple choice

Which of these is not a nutrient for plants?

  1. Water

  2. Mineral ions

  3. Carbon dioxide

  4. Nitrogen gas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Although nitrogen is an essential nutrient, most plants cannot utilize nitrogen gas (N2) directly from the air. They must absorb nitrogen from the soil in the form of nitrates or ammonium ions.

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