Multiple choice

______ is not a macronutrient

  1. C

  2. Cu

  3. N

  4. Fe
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Macronutrients are elements required by plants in relatively large amounts. These include carbon (C), nitrogen (N), phosphorus (P), potassium (K), calcium, magnesium, and sulfur. Iron (Fe) is a micronutrient but is often grouped with 'major nutrients' in some contexts. Copper (Cu) is definitively a micronutrient, required only in trace amounts as an enzyme cofactor (e.g., plastocyanin in photosynthesis).

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