Deficiency Symptoms and Correction · NCERT Biology

The appearance of brown spots surrounded by chlorotic veins is a prominent toxicity symptom of:

  1. Iron (Fe)
  2. Manganese
  3. Zinc (Zn)
  4. Boron (B)
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Correct answer: Manganese

Manganese toxicity manifests as brown spots on leaves. It induces deficiencies of Iron, Magnesium, and Calcium by competing for uptake and binding sites.

Difficulty: Medium Question 7 of 19

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